%0 Journal Article %A V. A. Zmorovich %T Some questions in the theory of convergence of series with positive terms %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 1958 %P 60-79 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_1958_1_a6/ %G ru %F IVM_1958_1_a6