@article{ARM_1979__15_2_a2,
     author = {Krupka, Demeter},
     title = {Reducibility theorems for differentiable liftings in fiber bundles},
     journal = {Archivum mathematicum},
     pages = {93--106},
     publisher = {mathdoc},
     volume = {15},
     number = {2},
     year = {1979},
     mrnumber = {563142},
     zbl = {0439.55009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_1979__15_2_a2/}
}