@article{JRAM_1837__16_146996,
     author = {J.L. Raabe},
     title = {Bemerkung \"uber {Kreisfunctionen.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {219--220},
     publisher = {mathdoc},
     volume = {16},
     year = {1837},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1837__16_146996/}
}