%0 Journal Article %A A. L. Teptin %T Nonoscillation of solutions and the sign of the Green function %J Differencialʹnye uravneniâ %D 1984 %P 995-1005 %V 20 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1984_20_6_a8/ %G ru %F DE_1984_20_6_a8