@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/}
}