@book{MSM_1927__26__1_0,
     author = {Gambier, Bertrand},
     title = {D\'eformation des surfaces \'etudi\'ee du point de vue infinit\'esimal},
     series = {M\'emorial des sciences math\'ematiques},
     publisher = {Gauthier-Villars},
     number = {26},
     year = {1927},
     language = {fr},
     url = {http://archive.numdam.org/item/MSM_1927__26__1_0/}
}