@article{DAN_1988_298_6_a12,
     author = {Yu. B. Rudyak},
     title = {On the orientability of spherical, topological and piecewise},
     journal = {Doklady Akademii Nauk},
     pages = {1338--1341},
     publisher = {mathdoc},
     volume = {298},
     number = {6},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1988_298_6_a12/}
}