@article{JRAM_1851__41_147488,
     author = {Karl Schellbach},
     title = {Probleme der {Variationsrechnung.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {293--363},
     publisher = {mathdoc},
     volume = {41},
     year = {1851},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1851__41_147488/}
}