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@article{DE_1973_9_6_a0, author = {Ya. V. Bykov and N. I. Fomina}, title = {The singular solutions of nonlinear differential {equations.~I}}, journal = {Differencialʹnye uravneni\^a}, pages = {983--994}, publisher = {mathdoc}, volume = {9}, number = {6}, year = {1973}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1973_9_6_a0/} }
Ya. V. Bykov; N. I. Fomina. The singular solutions of nonlinear differential equations.~I. Differencialʹnye uravneniâ, Tome 9 (1973) no. 6, pp. 983-994. http://geodesic.mathdoc.fr/item/DE_1973_9_6_a0/