@article{JRAM_1873__76_148209,
     author = {C.W. Borchardt},
     title = {Ueber die {Transformation} der {Elasticit\"atsgleichungen} in allgemeine orthogonale {Coordinaten.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {45--58},
     publisher = {mathdoc},
     volume = {76},
     year = {1873},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1873__76_148209/}
}