@book{PPN58505519X, title = {Fonctions de variables r\'eelles Partie 1}, series = {GDML\_Books}, publisher = {Hermann}, address = {Paris}, year = {1892}, language = {fr}, url = {http://dml.mathdoc.fr/item/PPN58505519X} }
Demartres, Gustave León. Fonctions de variables réelles Partie 1. GDML_Books (1892), http://gdmltest.u-ga.fr/item/PPN58505519X/