@phdthesis{THESE_1923__41__1_0, author = {Lagrange, Ren\'e}, title = {Sur le calcul diff\'erentiel absolu}, series = {Th\`eses de l'entre-deux-guerres}, number = {41}, year = {1923}, mrnumber = {3532910}, language = {fr}, url = {http://archive.numdam.org/item/THESE_1923__41__1_0/} }