@article{JRAM_1851__42_183324,
     author = {William Spottiswoode},
     title = {M\'emoire sur quelques formules relatives aux surfaces du second ordre.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {169--178},
     publisher = {mathdoc},
     volume = {42},
     year = {1851},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1851__42_183324/}
}