%0 Journal Article
%A V. G. Il'ichev
%T Delta functions and the investigation of Volterra ecological models in a~changing environment
%J Izvestiâ vysših učebnyh zavedenij. Matematika
%D 1998
%P 23-33
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IVM_1998_4_a3/
%G ru
%F IVM_1998_4_a3