%0 Journal Article %A V. I. Kas'yanov %T Some approximate methods for solving multidimensional singular equations %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 1981 %P 51-59 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_1981_3_a7/ %G ru %F IVM_1981_3_a7