@article{DAN_1958_119_2_a5,
     author = {A. S. Schwarz},
     title = {The genus of fiber space},
     journal = {Doklady Akademii Nauk},
     pages = {219--222},
     publisher = {mathdoc},
     volume = {119},
     number = {2},
     year = {1958},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1958_119_2_a5/}
}