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@article{IVM_1974_4_a14, author = {Ya. L. Shapiro and N. I. Zhukova}, title = {Simple transversal bifibrations}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {104--113}, publisher = {mathdoc}, number = {4}, year = {1974}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1974_4_a14/} }
Ya. L. Shapiro; N. I. Zhukova. Simple transversal bifibrations. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 4 (1974), pp. 104-113. http://geodesic.mathdoc.fr/item/IVM_1974_4_a14/