Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1970_191_1_a11, author = {\`E. V. Gaushus}, title = {Bifurcation theory of point transformations}, journal = {Doklady Akademii Nauk}, pages = {43--46}, publisher = {mathdoc}, volume = {191}, number = {1}, year = {1970}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1970_191_1_a11/} }
È. V. Gaushus. Bifurcation theory of point transformations. Doklady Akademii Nauk, Tome 191 (1970) no. 1, pp. 43-46. http://geodesic.mathdoc.fr/item/DAN_1970_191_1_a11/