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@article{IVM_2007_6_a5, author = {O. A. Koshcheeva}, title = {Depression conditions for linear equations with major partial derivatives}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {45--54}, publisher = {mathdoc}, number = {6}, year = {2007}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_2007_6_a5/} }
O. A. Koshcheeva. Depression conditions for linear equations with major partial derivatives. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 6 (2007), pp. 45-54. http://geodesic.mathdoc.fr/item/IVM_2007_6_a5/