@article{JRAM_1834__12_146895,
     author = {A.F. M\"obius},
     title = {Beweis der {Gleichung} 0{\textdegree} = 1, nach {J.} {F.} {Pfaff.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {134--136},
     publisher = {mathdoc},
     volume = {12},
     year = {1834},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1834__12_146895/}
}