@article{JRAM_1873__75_148191,
     author = {H. Helmholtz},
     title = {Ueber die {Theorie} der {Elektrodynamik.} {Zweite} {Abhandlung.} {Kritisches.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {35--66},
     publisher = {mathdoc},
     volume = {75},
     year = {1873},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1873__75_148191/}
}