@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/}
}