@article{SM_1991_68_2_a6,
     author = {Yu. B. Rudyak},
     title = {Orientability of bundles: obstruction theory and applications to $K$-theory},
     journal = {Sbornik. Mathematics},
     pages = {429--451},
     publisher = {mathdoc},
     volume = {68},
     number = {2},
     year = {1991},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1991_68_2_a6/}
}