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@article{IVM_1960_1_a4, author = {Yu. E. Borovskii}, title = {Completely integrable {Pfaffian} systems}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {35--38}, publisher = {mathdoc}, number = {1}, year = {1960}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1960_1_a4/} }
Yu. E. Borovskii. Completely integrable Pfaffian systems. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 1 (1960), pp. 35-38. http://geodesic.mathdoc.fr/item/IVM_1960_1_a4/