@article{JRAM_1980__314_152220,
     author = {W. Hansen},
     title = {Semi-polar sets are almost negligible.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {217--220},
     publisher = {mathdoc},
     volume = {314},
     year = {1980},
     zbl = {0422.31009},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1980__314_152220/}
}