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@article{IVM_1977_4_a6, author = {V. N. Koshelev}, title = {A~theorem of existence for variational problems on a~set of discontinuous functions}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {53--59}, publisher = {mathdoc}, number = {4}, year = {1977}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1977_4_a6/} }
V. N. Koshelev. A~theorem of existence for variational problems on a~set of discontinuous functions. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 4 (1977), pp. 53-59. http://geodesic.mathdoc.fr/item/IVM_1977_4_a6/