Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_1997_61_2_a12, author = {A. D. Ioffe and V. M. Tikhomirov}, title = {Some remarks on variational principles}, journal = {Matemati\v{c}eskie zametki}, pages = {305--311}, publisher = {mathdoc}, volume = {61}, number = {2}, year = {1997}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1997_61_2_a12/} }
A. D. Ioffe; V. M. Tikhomirov. Some remarks on variational principles. Matematičeskie zametki, Tome 61 (1997) no. 2, pp. 305-311. http://geodesic.mathdoc.fr/item/MZM_1997_61_2_a12/