@article{IVM_1972_12_a12,
     author = {A. P. Shirokov},
     title = {Fiber bundles of involutions},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {116--123},
     year = {1972},
     number = {12},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1972_12_a12/}
}