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@article{DAN_1962_142_6_a3, author = {D. A. Gudkov}, title = {Variability of simple double points of real plane algebraic curves}, journal = {Doklady Akademii Nauk}, pages = {1233--1235}, publisher = {mathdoc}, volume = {142}, number = {6}, year = {1962}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1962_142_6_a3/} }
D. A. Gudkov. Variability of simple double points of real plane algebraic curves. Doklady Akademii Nauk, Tome 142 (1962) no. 6, pp. 1233-1235. http://geodesic.mathdoc.fr/item/DAN_1962_142_6_a3/