%0 Journal Article
%A A. F. Andreev
%A T. V. Stepanova
%T The number of Frommer substitutions sufficient to reveal all ${\rm TO}$-curves of the equation $X(x,\,y)\,dy=Y(x,\,y)\,dx$
%J Differencialʹnye uravneniâ
%D 1968
%P 1560-1573
%V 4
%N 9
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1968_4_9_a1/
%G ru
%F DE_1968_4_9_a1