@article{10_4064_ap_56_3_295_301,
     author = {Zbigniew Szafraniec},
     title = {On topological invariants of vector bundles},
     journal = {Annales Polonici Mathematici},
     pages = {295--301},
     publisher = {mathdoc},
     volume = {56},
     number = {3},
     year = {1991},
     doi = {10.4064/ap-56-3-295-301},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-56-3-295-301/}
}