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@article{IVM_1969_7_a7, author = {S. E. Karapetyan}, title = {A~geometric meaning of conjugate directions of {a~Grassmann} manifold}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {59--64}, publisher = {mathdoc}, number = {7}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1969_7_a7/} }
S. E. Karapetyan. A~geometric meaning of conjugate directions of a~Grassmann manifold. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 7 (1969), pp. 59-64. http://geodesic.mathdoc.fr/item/IVM_1969_7_a7/