%0 Journal Article
%A A. A. Il'yushin
%A M. Imanaliev
%A N. M. Matveev
%A Yu. A. Mitropol'skii
%T Aleksandr Nikolaevich Filatov (on the occasion of his fiftieth birthday)
%J Differencialʹnye uravneniâ
%D 1982
%P 360-362
%V 18
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1982_18_2_a26/
%G ru
%F DE_1982_18_2_a26