@article{JMPA_1903_5_9__376_0,
     author = {Pech, Robert},
     title = {Extrait d'une {Lettre} de {M.} {Robert} {Pech} \`a {M.} {Jordan}},
     journal = {Journal de Math\'ematiques Pures et Appliqu\'ees},
     pages = {376--376},
     publisher = {Gauthier-Villars},
     volume = {5e s{\'e}rie, 9},
     year = {1903},
     language = {fr},
     url = {http://www.numdam.org/item/JMPA_1903_5_9__376_0/}
}