@article{JMPA_1880_3_6__S5_0, author = {de Courcel, G.}, title = {Avertissement}, journal = {Journal de Math\'ematiques Pures et Appliqu\'ees}, pages = {S5--S10}, publisher = {Gauthier-Villars}, volume = {3e s{\'e}rie, 6}, year = {1880}, language = {fr}, url = {http://archive.numdam.org/item/JMPA_1880_3_6__S5_0/} }