%0 Journal Article %A L. G. Mikhailov %T On the theory of total differentials with singular points %J Doklady Akademii Nauk %D 1992 %P 646-650 %V 322 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1992_322_4_a3/ %G ru %F DAN_1992_322_4_a3