%0 Journal Article
%A Ya. L. Shapiro
%A V. A. Igoshin
%A E. I. Yakovlev
%T Some geodesic models and an expansion theorem for second-order differential equations of the second degree
%J Izvestiâ vysših učebnyh zavedenij. Matematika
%D 1983
%P 74-76
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IVM_1983_6_a16/
%G ru
%F IVM_1983_6_a16