%0 Journal Article %A S. G. Kondratenya %T Third-order equations without movable essentially singular points. I %J Differencialʹnye uravneniâ %D 1996 %P 755-758 %V 32 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1996_32_6_a4/ %G ru %F DE_1996_32_6_a4