@article{JRAM_1927__156_149603,
     author = {Robert Hau{\ss}ner},
     title = {\"Uber numerische {L\"osungen} der {Kongruenz} u p-1 - 1 ---0 (mod p2).},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {223--226},
     publisher = {mathdoc},
     volume = {156},
     year = {1927},
     zbl = {53.0129.03},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1927__156_149603/}
}