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@article{DAN_1992_322_4_a3, author = {L. G. Mikhailov}, title = {On the theory of total differentials with singular points}, journal = {Doklady Akademii Nauk}, pages = {646--650}, publisher = {mathdoc}, volume = {322}, number = {4}, year = {1992}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1992_322_4_a3/} }
L. G. Mikhailov. On the theory of total differentials with singular points. Doklady Akademii Nauk, Tome 322 (1992) no. 4, pp. 646-650. http://geodesic.mathdoc.fr/item/DAN_1992_322_4_a3/