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@article{IVM_1968_3_a13, author = {S. E. Tychinina}, title = {$T$ pairs of congruences of planes in $P_5$}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {104--112}, publisher = {mathdoc}, number = {3}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1968_3_a13/} }
S. E. Tychinina. $T$ pairs of congruences of planes in $P_5$. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 3 (1968), pp. 104-112. http://geodesic.mathdoc.fr/item/IVM_1968_3_a13/