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@article{IVM_1970_11_a8, author = {G. N. Makeev}, title = {Stratifiable pairs of two-parameter families of $(n-1)$-planes in $P_{2n-1}$}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {76--86}, publisher = {mathdoc}, number = {11}, year = {1970}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1970_11_a8/} }
G. N. Makeev. Stratifiable pairs of two-parameter families of $(n-1)$-planes in $P_{2n-1}$. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 11 (1970), pp. 76-86. http://geodesic.mathdoc.fr/item/IVM_1970_11_a8/