@article{JRAM_1895__114_148953,
     author = {A. Gutzmer},
     title = {Ueber den analytischen {Ausdruck} des {Huygensschen} {Princips.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {333--337},
     publisher = {mathdoc},
     volume = {114},
     year = {1895},
     zbl = {26.0940.01},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1895__114_148953/}
}