Delone, B. N.; Ryshkov, S. S. A contribution to the theory of the extrema of a multidimensional \(\zeta\)-function. (English. Russian original) Zbl 0155.09301 Sov. Math., Dokl. 8, 499-503 (1967); translation from Dokl. Akad. Nauk SSSR 173, 991-994 (1967). PDF BibTeX XML Cite \textit{B. N. Delone} and \textit{S. S. Ryshkov}, Sov. Math., Dokl. 8, 499--503 (1967; Zbl 0155.09301); translation from Dokl. Akad. Nauk SSSR 173, 991--994 (1967)
Delone, B. N.; Sandakova, N. N.; Ryshkov, S. S. Optimal cubature lattice for functions of two variables that are smooth on all sides. (English. Russian original) Zbl 0136.43201 Sov. Math., Dokl. 6, 836-839 (1965); translation from Dokl. Akad. Nauk SSSR 162, 1230-1233 (1965). PDF BibTeX XML Cite \textit{B. N. Delone} et al., Sov. Math., Dokl. 6, 836--839 (1965; Zbl 0136.43201); translation from Dokl. Akad. Nauk SSSR 162, 1230--1233 (1965)