@book{MSM_1935__71__1_0,
     author = {Bouligand, G.},
     title = {G\'eom\'etrie infinit\'esimale directe et physique math\'ematique classique},
     series = {M\'emorial des sciences math\'ematiques},
     publisher = {Gauthier-Villars},
     number = {71},
     year = {1935},
     language = {fr},
     url = {http://www.numdam.org/item/MSM_1935__71__1_0/}
}