Journal of Hyperstructures Short Title: J. Hyperstruct. Publisher: University of Mohaghegh Ardabili, Faculty of Mathematical Sciences, Ardabil ISSN: 2251-8436; 2322-1666/e Online: http://www.jhs-uma.com/index.php/JHSMS/issue/archive Comments: Indexed cover-to-cover; This journal is available open access. Documents Indexed: 143 Publications (since 2012) all top 5 Latest Issues 10, No. 2 (2021) 10, No. 1 (2021) 9, No. 2 (2020) 9, No. 1 (2020) 8, No. 2 (2020) 8, No. 1 (2019) 7, No. 2 (2018) 7, No. 1 (2017) 6, No. 2 (2017) 6, No. 1 (2017) 6, Spec. Iss. (2017) 5, No. 2 (2016) 5, No. 1 (2016) 4, No. 2 (2015) 4, No. 1 (2015) 3, No. 2 (2014) 3, No. 1 (2014) 2, No. 2 (2013) 2, No. 1 (2013) 1, No. 2 (2012) 1, No. 1 (2012) all top 5 Authors 5 Mirzaee, Farshid 5 Pawar, Kishor Fakira 4 Nimbhorkar, Shriram Khanderao 3 Abazari, Nemat 3 Alimohammady, Mohsen 3 Ersoy, Bayram Ali 3 Khubchandani, Jyoti Ashok 3 Krishna Rao, Marapureddy Murali 3 Onar, Serkan 3 Samanta, Tapas Kumar 3 Sardar, Sujit Kumar 3 Sayevand, Khosro 3 Sonmez, Deniz 2 Azar, Kazem Haghnejad 2 Babaei, Afshin 2 Davvaz, Bijan 2 Ebrahimpour, Mahdieh 2 Eghbali, Nasrin 2 Fathi Vajargah, Behrouz 2 Ganji, Masoud 2 Ghaffari Hadigheh, Alireza 2 Ghosh, Jayanta 2 Hadadiyan, Elham 2 Jadhav, Megha Madhavrao 2 Jafarpour, Morteza 2 Jassim, Hassan Kamil 2 Kehayopulu, Niovi 2 Kolluru, Venkateswarlu 2 Mohammadpour, Alireza 2 Mohanraj, Gnanasigamani 2 Mondal, Pratap 2 Moosaei, Mohammad 2 Mostafa, Samy M. 2 Motahari, Narges 2 Paripour, Mahmoud 2 Payrovi, Shiroyeh 2 Roudbari, Tahereh 2 Sahraei, Masoud 2 Torkzadeh, Lida 2 Tsafack, Surdive Atamewoue 2 Zarebnia, Mohammad 1 Abbasian, Leila 1 Abdolzadeh, Hossein 1 Abedini, Majid 1 Afzal, Farkhanda 1 Aghabozorgi, Hossien 1 Ahadpanah, Afsaneh 1 Ahmad, Imtiaz 1 Alamirew, Wondie Litegebe 1 Albert, Bobin 1 Alvandi, Azizallah 1 Amassayoga, Ogadoa 1 Aminikhah, Hossein 1 Amouzegar, Taybeh 1 Ansari, Safoora J. 1 Ansari, Safoora Samreen Jamal Abdul Nasir 1 Arad, Fereshteh 1 Arkan, Tuğba 1 Asayesh, Roxana 1 Ayati, Zainab 1 Aygün, Halis 1 Aygünoğlu, Abdülkadir 1 Ayub, Saba 1 Azami, Jafar 1 Azimian, Masoud 1 Babaei, Sakineh 1 Baghdari, Samaneh 1 Bahramnezhad, Akbar 1 Banihashemi, Seddigheh 1 Bashir, Shahida 1 Behzadi, Mohadeseh 1 Belayneh, Berhanu Bekele 1 Bhatti, I. S. 1 Bijan-Zadeh, Mohammad Hossein 1 Borzooei, Rajab Ali 1 Çağman, Naim 1 Caksu Guler, Aysegul 1 Célestin, Lele 1 Chanda, Tanusree 1 Chashiyani, Abdolah 1 Chernet, Dawit 1 Chong, Un-Hua 1 Corsini, Piergiulio 1 Cuvalcioglu, Gokhan 1 Das, Ashoke 1 Das, Kousik 1 Das, Sampad 1 Dastour, Hatef 1 Değirmenci, Oğuzhan 1 Dehghan-Nezhad, Akbar 1 Dehkordi, Sohrab Ostadhadi 1 Demissie, Ketsela Hailu 1 Derakhshan, Maryam 1 Dheena, Patchirajulu 1 Dutta, Ratan Kumar 1 Dutta, Tapan Kumar 1 Ebrahimi, Parvin 1 Erfanifar, Raziyeh 1 Esmaeili, Hamid 1 Estaji, Ali Akbar ...and 119 more Authors all top 5 Fields 24 Associative rings and algebras (16-XX) 23 Order, lattices, ordered algebraic structures (06-XX) 21 Group theory and generalizations (20-XX) 21 Numerical analysis (65-XX) 14 Commutative algebra (13-XX) 12 Mathematical logic and foundations (03-XX) 11 Integral equations (45-XX) 9 Operator theory (47-XX) 8 Partial differential equations (35-XX) 7 Functional analysis (46-XX) 7 General topology (54-XX) 6 Statistics (62-XX) 6 Operations research, mathematical programming (90-XX) 5 General algebraic systems (08-XX) 4 Combinatorics (05-XX) 4 Linear and multilinear algebra; matrix theory (15-XX) 4 Ordinary differential equations (34-XX) 4 Calculus of variations and optimal control; optimization (49-XX) 4 Probability theory and stochastic processes (60-XX) 3 Real functions (26-XX) 3 Difference and functional equations (39-XX) 3 Approximations and expansions (41-XX) 3 Differential geometry (53-XX) 2 Number theory (11-XX) 2 Field theory and polynomials (12-XX) 2 Algebraic geometry (14-XX) 2 Category theory; homological algebra (18-XX) 2 Topological groups, Lie groups (22-XX) 2 Functions of a complex variable (30-XX) 2 Dynamical systems and ergodic theory (37-XX) 2 Computer science (68-XX) 2 Game theory, economics, finance, and other social and behavioral sciences (91-XX) 2 Information and communication theory, circuits (94-XX) 1 Classical thermodynamics, heat transfer (80-XX) 1 Relativity and gravitational theory (83-XX) Publications by Year all cited Publications top 5 cited Publications Citations contained in zbMATH Open 36 Publications have been cited 57 times in 54 Documents Cited by ▼ Year ▼ Numerical solution of Fredholm fuzzy integral equations of the second kind via direct method using triangular functions. Zbl 1290.65131Mirzaee, F.; Paripour, M.; Yari, M. Komak 7 2012 On fuzzy soft rings. Zbl 1290.16052Pazar Varol, B.; Aygünoğlu, A.; Aygün, H. 5 2012 A collocation method to the solution of nonlinear Fredholm-Hammerstein integral and integro-differential equations. Zbl 1303.65111Mirzaee, Farshid; Hadadiyan, Elham 3 2013 A fourth-order iterative method for computing the Moore-Penrose inverse. Zbl 1416.65112Esmaeili, Hamid; Erfanifar, Raziyeh; Rashidi, Mahdis 2 2017 Prime and semiprime L-fuzzy soft bi-hyperideals. Zbl 1416.20010Shabir, Muhammad; Ayub, Saba; Bashir, Shahida 2 2017 The stability of a general quadratic functional equation in fuzzy Banach spaces. Zbl 1290.39021Samanta, T. K.; Kayal, N. Chandra; Mondal, P. 2 2012 Strongly \(s\)-dense monomorphisms. Zbl 1257.20063Barzegar, H. 2 2012 Using feed-back neural network method for solving linear Fredholm integral equations of the second kind. Zbl 1303.65108Jafarian, Ahmad; Nia, Safa Measoomy 2 2013 Soft category theory – an introduction. Zbl 1304.18002Sardar, Sujit Kumar; Gupta, Sugato 2 2013 On \((\odot, \vee)\)-derivations for BL-algebras. Zbl 1301.06029Torkzadeh, Lida; Abbasian, Leila 2 2013 On the 2-absorbing ideals and zero divisor graph of equivalence classes of zero divisors. Zbl 1330.13006Payrovi, Shiroyeh; Babaei, Sakineh 2 2014 Numerical solution of some class of integro-differential equations by using Legendre-Bernstein basis. Zbl 1330.65202Mirzaee, Farshid; Fathi, Sasan 2 2014 The stability of Pexider type functional equation in intuitionistic fuzzy Banach spaces via fixed point technique. Zbl 1418.39026Mondal, Pratap 1 2015 Factorization properties and generalization of multipliers in module actions. Zbl 1416.46049Haghnejad Azar, Kazem 1 2015 On the matrix of rank one over a UFD. Zbl 1416.15025Hadjirezaei, Somayeh; Karimzadeh, Somayeh 1 2016 Reproducing kernel method for solving Wiener-Hopf equations of the second kind. Zbl 1416.65526Alvandi, Azizallah; Lotfi, Taher; Paripour, Mahmoud 1 2016 Differential transformation method for solving hybrid fuzzy differential equations. Zbl 1416.65191Ghazanfari, Bahman; Ebrahimi, Parvin 1 2016 On fuzzy prime and fuzzy semiprime ideals of \(\le\)-hypergroupoids. Zbl 1416.06013Kehayopulu, Niovi 1 2016 Generating the generalized distributions by using fractional calculus. Zbl 1416.60027Ganji, Masoud; Gharari, Fatemeh 1 2016 \((n-1,n)\)-weakly prime submodules in direct product of modules. Zbl 1416.13002Ebrahimpour, Mahdieh 1 2017 Hyper structure theory applied to KU-algebras. Zbl 1416.06011Mostafa, Samy M.; Kareem, Fatema F.; Davvaz, Bijan 1 2017 Soft intersection Abel-Grassmann’s groups. Zbl 1416.20011Ullah, Aman; Ahmad, Imtiaz; Hayat, Fazal; Karaaslan, Faruk; Rashad, Muhammad 1 2018 Vague soft near-rings. Zbl 1416.16047Patil, Sushama Vijaykumar; Yadav, Janardan Dhyandev 1 2019 Fuzzy \(n\)-fold obstinate ideals in MV-algebras. Zbl 1416.06004Forouzesh, Fereshteh 1 2019 Anti fuzzy ideal extension of semigroups. Zbl 1256.20074Pal, P.; Majumder, S. Kumar; Sardar, S. Kumar 1 2012 Probabilistic modular metric spaces. Zbl 1462.54027Fathi Vajargah, Kianoush; Mottaghi Golshan, Hamid 1 2020 On quasi-ideals of \(\Gamma\)-semihyperrings. Zbl 1446.16049Patil, Jitendrasing J.; Pawar, Kishor F. 1 2020 On systems, maximal \(\Gamma\)-hyperideals and complete prime \(\Gamma\)-radicals in \(\Gamma\)-semihypergroups. Zbl 1446.20083Pawar, Kishor Fakira; Ansari, Safoora J. 1 2020 Fuzzy small right ideals of rings. Zbl 1300.16051Dheena, P.; Mohanraj, G. 1 2013 Rough soft sets and rough soft groups. Zbl 1300.20064Ghosh, Jayanta; Samanta, Tapas Kumar 1 2013 Graph based on residuated lattices. Zbl 1341.03093Torkzadeh, Lida; Ahadpanah, Afsaneh; Behzadi, Mohadeseh 1 2014 Numerical solution of variational problems via parametric quintic spline method. Zbl 1330.65100Zarebnia, Mohammad; Sarvari, Zahra 1 2014 A note on properties of hypermetric spaces. Zbl 1329.54028Alimohammady, Mohsen; Jafari, Saeid; Moshokoa, Seithuti P.; Kalleji, Koozehgar Morteza 1 2014 Analytical approximation solution of a mathematical modeling of reaction-diffusion Brusselator system by reduced differential transform method. Zbl 1329.35339Taghavi, A.; Babaei, A.; Mohammadpour, A. 1 2014 A study on existence and global asymptotical Mittag-Leffler stability of fractional Black-Scholes European option pricing equation. Zbl 1410.91464Sayevand, K. 1 2014 Pricing formula for exchange option in fractional Black-Scholes model with jumps. Zbl 1410.91455Kim, Kyong-Hui; Sin, Myong-Guk; Chong, Un-Hua 1 2014 Probabilistic modular metric spaces. Zbl 1462.54027Fathi Vajargah, Kianoush; Mottaghi Golshan, Hamid 1 2020 On quasi-ideals of \(\Gamma\)-semihyperrings. Zbl 1446.16049Patil, Jitendrasing J.; Pawar, Kishor F. 1 2020 On systems, maximal \(\Gamma\)-hyperideals and complete prime \(\Gamma\)-radicals in \(\Gamma\)-semihypergroups. Zbl 1446.20083Pawar, Kishor Fakira; Ansari, Safoora J. 1 2020 Vague soft near-rings. Zbl 1416.16047Patil, Sushama Vijaykumar; Yadav, Janardan Dhyandev 1 2019 Fuzzy \(n\)-fold obstinate ideals in MV-algebras. Zbl 1416.06004Forouzesh, Fereshteh 1 2019 Soft intersection Abel-Grassmann’s groups. Zbl 1416.20011Ullah, Aman; Ahmad, Imtiaz; Hayat, Fazal; Karaaslan, Faruk; Rashad, Muhammad 1 2018 A fourth-order iterative method for computing the Moore-Penrose inverse. Zbl 1416.65112Esmaeili, Hamid; Erfanifar, Raziyeh; Rashidi, Mahdis 2 2017 Prime and semiprime L-fuzzy soft bi-hyperideals. Zbl 1416.20010Shabir, Muhammad; Ayub, Saba; Bashir, Shahida 2 2017 \((n-1,n)\)-weakly prime submodules in direct product of modules. Zbl 1416.13002Ebrahimpour, Mahdieh 1 2017 Hyper structure theory applied to KU-algebras. Zbl 1416.06011Mostafa, Samy M.; Kareem, Fatema F.; Davvaz, Bijan 1 2017 On the matrix of rank one over a UFD. Zbl 1416.15025Hadjirezaei, Somayeh; Karimzadeh, Somayeh 1 2016 Reproducing kernel method for solving Wiener-Hopf equations of the second kind. Zbl 1416.65526Alvandi, Azizallah; Lotfi, Taher; Paripour, Mahmoud 1 2016 Differential transformation method for solving hybrid fuzzy differential equations. Zbl 1416.65191Ghazanfari, Bahman; Ebrahimi, Parvin 1 2016 On fuzzy prime and fuzzy semiprime ideals of \(\le\)-hypergroupoids. Zbl 1416.06013Kehayopulu, Niovi 1 2016 Generating the generalized distributions by using fractional calculus. Zbl 1416.60027Ganji, Masoud; Gharari, Fatemeh 1 2016 The stability of Pexider type functional equation in intuitionistic fuzzy Banach spaces via fixed point technique. Zbl 1418.39026Mondal, Pratap 1 2015 Factorization properties and generalization of multipliers in module actions. Zbl 1416.46049Haghnejad Azar, Kazem 1 2015 On the 2-absorbing ideals and zero divisor graph of equivalence classes of zero divisors. Zbl 1330.13006Payrovi, Shiroyeh; Babaei, Sakineh 2 2014 Numerical solution of some class of integro-differential equations by using Legendre-Bernstein basis. Zbl 1330.65202Mirzaee, Farshid; Fathi, Sasan 2 2014 Graph based on residuated lattices. Zbl 1341.03093Torkzadeh, Lida; Ahadpanah, Afsaneh; Behzadi, Mohadeseh 1 2014 Numerical solution of variational problems via parametric quintic spline method. Zbl 1330.65100Zarebnia, Mohammad; Sarvari, Zahra 1 2014 A note on properties of hypermetric spaces. Zbl 1329.54028Alimohammady, Mohsen; Jafari, Saeid; Moshokoa, Seithuti P.; Kalleji, Koozehgar Morteza 1 2014 Analytical approximation solution of a mathematical modeling of reaction-diffusion Brusselator system by reduced differential transform method. Zbl 1329.35339Taghavi, A.; Babaei, A.; Mohammadpour, A. 1 2014 A study on existence and global asymptotical Mittag-Leffler stability of fractional Black-Scholes European option pricing equation. Zbl 1410.91464Sayevand, K. 1 2014 Pricing formula for exchange option in fractional Black-Scholes model with jumps. Zbl 1410.91455Kim, Kyong-Hui; Sin, Myong-Guk; Chong, Un-Hua 1 2014 A collocation method to the solution of nonlinear Fredholm-Hammerstein integral and integro-differential equations. Zbl 1303.65111Mirzaee, Farshid; Hadadiyan, Elham 3 2013 Using feed-back neural network method for solving linear Fredholm integral equations of the second kind. Zbl 1303.65108Jafarian, Ahmad; Nia, Safa Measoomy 2 2013 Soft category theory – an introduction. Zbl 1304.18002Sardar, Sujit Kumar; Gupta, Sugato 2 2013 On \((\odot, \vee)\)-derivations for BL-algebras. Zbl 1301.06029Torkzadeh, Lida; Abbasian, Leila 2 2013 Fuzzy small right ideals of rings. Zbl 1300.16051Dheena, P.; Mohanraj, G. 1 2013 Rough soft sets and rough soft groups. Zbl 1300.20064Ghosh, Jayanta; Samanta, Tapas Kumar 1 2013 Numerical solution of Fredholm fuzzy integral equations of the second kind via direct method using triangular functions. Zbl 1290.65131Mirzaee, F.; Paripour, M.; Yari, M. Komak 7 2012 On fuzzy soft rings. Zbl 1290.16052Pazar Varol, B.; Aygünoğlu, A.; Aygün, H. 5 2012 The stability of a general quadratic functional equation in fuzzy Banach spaces. Zbl 1290.39021Samanta, T. K.; Kayal, N. Chandra; Mondal, P. 2 2012 Strongly \(s\)-dense monomorphisms. Zbl 1257.20063Barzegar, H. 2 2012 Anti fuzzy ideal extension of semigroups. Zbl 1256.20074Pal, P.; Majumder, S. Kumar; Sardar, S. Kumar 1 2012 all cited Publications top 5 cited Publications all top 5 Cited by 111 Authors 2 Iampan, Aiyared 2 Osheba, Heba S. 2 Ramadan, Mohamed Abdel-Latif 2 Shabir, Muhammad 1 Abbas, Tasmia 1 Agarwal, Praveen 1 Akbari Kojabad, Eisa 1 Ali, Md. Yasin 1 Alvandi, Azizallah 1 Ansari, Alireza 1 Anvariyeh, Seid Mohammad 1 Arafa, Anas. A. M. 1 Asady, Babak 1 Ayub, Saba 1 Babaaghaie, A. 1 Badawi, Ayman 1 Băleanu, Dumitru I. 1 Barootkoob, Sedigheh 1 Bashir, Shahida 1 Chinram, Ronnason 1 Chu, Yuming 1 Darani, Mohammadreza Ahmadi 1 Davvaz, Bijan 1 Ebrahimpour, Mahdieh 1 Eghdami, Hossien 1 El-Latif, Alaa M. Abd 1 Ergul, Zehra Guzel 1 Eshaghi, Shiva 1 Estaji, Ali Akbar 1 Fariborzi Araghi, Mohammad Ali 1 Fathi Vajargah, Kianoush 1 Fechner, Włodzimierz 1 Forouzesh, Fereshteh 1 Ganji, Masoud 1 Gharari, Fatemeh 1 Ghaziani, Reza Khoshsiar 1 Gholam, A. M. 1 Ghoreishi Najafabadi, Seyed Hossein 1 Golshan, Hamid Mottaghi 1 Gong, Zengtai 1 Gupta, Umesh Chandra 1 Gursoy, Mustafa Habil 1 Hadadian Nejad Yousefi, Mohsen 1 Hadhoud, Adel Rashad 1 Haghdadi, Toktam 1 Hakimzadegan, F. 1 İçen, İlhan 1 Intasan, Rossukon 1 Julatha, Pongpun 1 Kaewwasri, Arocha 1 Kansal, Munish 1 Kantli, Mounesha H. 1 Kaur, Manpreet 1 Kayal, Nabin Chandra 1 Kehayopulu, Niovi 1 Kim, Chang Bum 1 Kim, Hee Sik 1 Kumar, Sanjeev 1 Ma, Yong 1 Mahmood, Waqas 1 Maleknejad, Khosrow 1 Manikantan, T. 1 Mazhar, Rabia 1 Mirvakili, Saeed 1 Mirzaee, Farshid 1 Mishra, Seema 1 Mitra, Nirmal Kanti 1 Mondal, Pratap 1 Mundewadi, B. A. 1 Mundewadi, Ravikiran A. 1 Naganathan, S. 1 Nazarlue, R. 1 Noeiaghdam, Samad 1 Oguz, Gulay 1 Pan, Dongtao 1 Paripour, Mahmoud 1 Patil, Sushama Vijaykumar 1 Pawar, Kishor Fakira 1 Payrovi, S. H. 1 Praveen, J. Peter 1 Rahnama, Somayeh 1 Rajeswari, Kota Nagalakshmi 1 Ramkumar, Solai 1 Rao, Boggarapu Nageswara 1 Rashidinia, Jalil 1 Rezapour, Shahram 1 Sajjadian, Mehri 1 Samadyar, Nasrin 1 Samanta, Tapas Kumar 1 Satirad, Akarachai 1 Sawika, Kaewta 1 Sayed, Yara M. 1 Sengelen Sevim, E. 1 Shah, Kamal 1 Siripitukdet, Manoj 1 So, Keum Sook 1 Srivastava, Rekha 1 Stotsky, Alexander A. 1 Sultana, Abeda 1 Száz, Árpád ...and 11 more Authors all top 5 Cited in 39 Journals 4 Computational and Applied Mathematics 3 Advances in Difference Equations 3 International Journal of Applied and Computational Mathematics 3 Journal of Algebraic Systems 2 Journal of Computational and Applied Mathematics 2 Mathematical Problems in Engineering 2 Tbilisi Mathematical Journal 2 Mathematical Sciences 1 Applied Mathematics and Computation 1 Fuzzy Sets and Systems 1 Publications de l’Institut Mathématique. Nouvelle Série 1 Numerical Algorithms 1 Communications in Statistics. Theory and Methods 1 Applicable Algebra in Engineering, Communication and Computing 1 Applied Mathematics. Series B (English Edition) 1 Turkish Journal of Mathematics 1 Soft Computing 1 Discrete Dynamics in Nature and Society 1 Quantitative Finance 1 Journal of Applied Mathematics and Computing 1 Missouri Journal of Mathematical Sciences 1 South East Asian Journal of Mathematics and Mathematical Sciences 1 Hacettepe Journal of Mathematics and Statistics 1 Thai Journal of Mathematics 1 Proyecciones 1 European Journal of Pure and Applied Mathematics 1 Asian-European Journal of Mathematics 1 Acta Universitatis Sapientiae. Mathematica 1 Advances in Mathematical Physics 1 TWMS Journal of Pure and Applied Mathematics 1 Afrika Matematika 1 Electronic Journal of Mathematical Analysis and Applications EJMAA 1 Journal of Mathematics 1 Journal of Linear and Topological Algebra 1 Sahand Communications in Mathematical Analysis 1 Journal of Algebra and Related Topics 1 Journal of Algebra, Combinatorics, Discrete Structures and Applications 1 Korean Journal of Mathematics 1 AIMS Mathematics all top 5 Cited in 32 Fields 15 Numerical analysis (65-XX) 12 Integral equations (45-XX) 10 Order, lattices, ordered algebraic structures (06-XX) 9 Group theory and generalizations (20-XX) 7 Mathematical logic and foundations (03-XX) 6 Real functions (26-XX) 5 General algebraic systems (08-XX) 5 Commutative algebra (13-XX) 5 Associative rings and algebras (16-XX) 5 Ordinary differential equations (34-XX) 5 Difference and functional equations (39-XX) 5 General topology (54-XX) 4 Probability theory and stochastic processes (60-XX) 3 Functional analysis (46-XX) 2 Combinatorics (05-XX) 2 Category theory; homological algebra (18-XX) 2 Partial differential equations (35-XX) 2 Approximations and expansions (41-XX) 2 Operator theory (47-XX) 2 Statistics (62-XX) 1 Linear and multilinear algebra; matrix theory (15-XX) 1 Nonassociative rings and algebras (17-XX) 1 Topological groups, Lie groups (22-XX) 1 Special functions (33-XX) 1 Calculus of variations and optimal control; optimization (49-XX) 1 Algebraic topology (55-XX) 1 Computer science (68-XX) 1 Classical thermodynamics, heat transfer (80-XX) 1 Game theory, economics, finance, and other social and behavioral sciences (91-XX) 1 Biology and other natural sciences (92-XX) 1 Systems theory; control (93-XX) 1 Mathematics education (97-XX) Citations by Year