@article{JMPA_1840_1_5__186_0,
     author = {Lebesgue},
     title = {Note sur une formule de {M.} {Cauchy}},
     journal = {Journal de Math\'ematiques Pures et Appliqu\'ees},
     pages = {186--188},
     publisher = {Gauthier-Villars},
     volume = {1e s{\'e}rie, 5},
     year = {1840},
     language = {fr},
     url = {http://www.numdam.org/item/JMPA_1840_1_5__186_0/}
}