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@article{IVM_1974_6_a9, author = {G. B. Khasin}, title = {Three-parameter families of two-planes in projective four-space}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {80--90}, publisher = {mathdoc}, number = {6}, year = {1974}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1974_6_a9/} }
G. B. Khasin. Three-parameter families of two-planes in projective four-space. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 6 (1974), pp. 80-90. http://geodesic.mathdoc.fr/item/IVM_1974_6_a9/