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@article{DAN_1990_314_2_a0, author = {N. A. Bobylev and M. A. Krasnosel'skii}, title = {Bifurcation of extremals of variational problems}, journal = {Doklady Akademii Nauk}, pages = {265--268}, publisher = {mathdoc}, volume = {314}, number = {2}, year = {1990}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1990_314_2_a0/} }
N. A. Bobylev; M. A. Krasnosel'skii. Bifurcation of extremals of variational problems. Doklady Akademii Nauk, Tome 314 (1990) no. 2, pp. 265-268. http://geodesic.mathdoc.fr/item/DAN_1990_314_2_a0/