Borza, Mojtaba; Rambely, Azmin Sham; Saraj, Mansour Solving linear fractional programming problems with interval coefficients in the objective function. A new approach. (English) Zbl 1264.90167 Appl. Math. Sci., Ruse 6, No. 69-72, 3443-3452 (2012). MSC: 90C32 PDF BibTeX XML Cite \textit{M. Borza} et al., Appl. Math. Sci., Ruse 6, No. 69--72, 3443--3452 (2012; Zbl 1264.90167) Full Text: Link
Saraj, M.; Safaei, N. Solving bi-level programming problems on using global criterion method with an interval approach. (English) Zbl 1246.90139 Appl. Math. Sci., Ruse 6, No. 21-24, 1135-1141 (2012). MSC: 90C29 PDF BibTeX XML Cite \textit{M. Saraj} and \textit{N. Safaei}, Appl. Math. Sci., Ruse 6, No. 21--24, 1135--1141 (2012; Zbl 1246.90139) Full Text: Link