@article{JRAM_1872__74_148173,
     author = {R. Lipschitz},
     title = {Untersuchung eines {Problems} der {Variationsrechnung,} in welchem das {Problem} der {Mechanik} enthalten ist.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {116--149},
     publisher = {mathdoc},
     volume = {74},
     year = {1872},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1872__74_148173/}
}