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@article{IVM_2017_1_a10, author = {R. Pirov}, title = {On certain nonlinear systems of partial differential equations of the second order}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {97--100}, publisher = {mathdoc}, number = {1}, year = {2017}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_2017_1_a10/} }
R. Pirov. On certain nonlinear systems of partial differential equations of the second order. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 1 (2017), pp. 97-100. http://geodesic.mathdoc.fr/item/IVM_2017_1_a10/