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@article{DAN_1987_293_2_a18, author = {N. S. Kellin}, title = {Conditionally stationary initial-boundary value problems in}, journal = {Doklady Akademii Nauk}, pages = {339--342}, publisher = {mathdoc}, volume = {293}, number = {2}, year = {1987}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1987_293_2_a18/} }
N. S. Kellin. Conditionally stationary initial-boundary value problems in. Doklady Akademii Nauk, Tome 293 (1987) no. 2, pp. 339-342. http://geodesic.mathdoc.fr/item/DAN_1987_293_2_a18/