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@article{TM_1990_192_a7, author = {L. D. Kudryavtsev}, title = {Variational problems with a~different number of boundary conditions}, journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova}, pages = {85--104}, publisher = {mathdoc}, volume = {192}, year = {1990}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TM_1990_192_a7/} }
L. D. Kudryavtsev. Variational problems with a~different number of boundary conditions. Trudy Matematicheskogo Instituta imeni V.A. Steklova, Differential equations and functional spaces, Tome 192 (1990), pp. 85-104. http://geodesic.mathdoc.fr/item/TM_1990_192_a7/