@article{JRAM_1851__42_183334,
     author = {Ch. Graves},
     title = {Elementary geometrical proof of {Joachimsthal} theorem.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {279--279},
     publisher = {mathdoc},
     volume = {42},
     year = {1851},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1851__42_183334/}
}