@article{JRAM_1862__60_147850,
     author = {A. Clebsch},
     title = {Ueber das {Pfaffsche} {Problem.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {193--251},
     publisher = {mathdoc},
     volume = {60},
     year = {1862},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1862__60_147850/}
}