Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MMO_1953_2_a3, author = {A. G. Sigalov}, title = {Two-dimensional problems of the calculus of variations in nonparametric form}, journal = {Trudy Moskovskogo matemati\v{c}eskogo ob\^{s}estva}, pages = {201--233}, publisher = {mathdoc}, volume = {2}, year = {1953}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MMO_1953_2_a3/} }
A. G. Sigalov. Two-dimensional problems of the calculus of variations in nonparametric form. Trudy Moskovskogo matematičeskogo obŝestva, Trudy Moskovskogo Matematicheskogo Obshchestva, Tome 2 (1953), pp. 201-233. http://geodesic.mathdoc.fr/item/MMO_1953_2_a3/