@article{JRAM_1990__403_153191,
     author = {Peter Petersen},
     title = {Fatness of covers.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {154--165},
     publisher = {mathdoc},
     volume = {403},
     year = {1990},
     zbl = {0675.57001},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1990__403_153191/}
}