@article{JRAM_1980__317_152255,
     author = {Knud Lonsted},
     title = {On the embedding of coverings into 1-dimensional bundles.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {88--101},
     year = {1980},
     volume = {317},
     zbl = {0424.55012},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1980__317_152255/}
}