@article{MZ_1993__212_4_174485,
     author = {Daniel Mall},
     title = {Filtrable bundles of rank 2 on {Hopf} surfaces.},
     journal = {Mathematische Zeitschrift},
     pages = {239--256},
     year = {1993},
     volume = {212},
     number = {4},
     zbl = {0821.32024},
     url = {http://geodesic.mathdoc.fr/item/MZ_1993__212_4_174485/}
}