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@article{IVM_1958_1_a8, author = {G. E. Izotov}, title = {Surfaces of second order of a~biplanar space}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {89--102}, publisher = {mathdoc}, number = {1}, year = {1958}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1958_1_a8/} }
G. E. Izotov. Surfaces of second order of a~biplanar space. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 1 (1958), pp. 89-102. http://geodesic.mathdoc.fr/item/IVM_1958_1_a8/