%0 Journal Article
%A R. S. Levitin
%T Frommer's first distinguishing problem for perturbations from Osgood and Tamarkin classes
%J Differencialʹnye uravneniâ
%D 1969
%P 1236-1246
%V 5
%N 7
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1969_5_7_a8/
%G ru
%F DE_1969_5_7_a8