@article{VMUMM_1999_6_a8,
     author = {A. V. Ershov},
     title = {On homotopy properties of bundles with a structural group of automorphisms of matrix algebras},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {56--60},
     year = {1999},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1999_6_a8/}
}