@article{JMPA_1842_1_7__160_0,
     author = {Liouville, J.},
     title = {Sur les fractions qui se pr\'esentent sous la forme ind\'etermin\'ee $\frac{\infty}{\infty}$},
     journal = {Journal de Math\'ematiques Pures et Appliqu\'ees},
     pages = {160--162},
     publisher = {Gauthier-Villars},
     volume = {1e s{\'e}rie, 7},
     year = {1842},
     language = {fr},
     url = {http://www.numdam.org/item/JMPA_1842_1_7__160_0/}
}