@article{JMPA_1841_1_6__14_0,
     author = {Bertrand, J.},
     title = {Note sur la vraie valeur des fractions qui prennent la forme $\frac{\infty}{\infty}$},
     journal = {Journal de Math\'ematiques Pures et Appliqu\'ees},
     pages = {14--16},
     publisher = {Gauthier-Villars},
     volume = {1e s{\'e}rie, 6},
     year = {1841},
     language = {fr},
     url = {http://www.numdam.org/item/JMPA_1841_1_6__14_0/}
}