%0 Journal Article
%A L. N. Lyapin
%T Upper and lower solution of equations of evolution type
%J Differencialʹnye uravneniâ
%D 1980
%P 1885-1887
%V 16
%N 10
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1980_16_10_a18/
%G ru
%F DE_1980_16_10_a18