@book{MSM_1926__12__1_0,
     author = {Gosse, R.},
     title = {La m\'ethode de {Darboux} et les \'equations $s = f(x, y, z, p, q)$},
     series = {M\'emorial des sciences math\'ematiques},
     publisher = {Gauthier-Villars},
     number = {12},
     year = {1926},
     language = {fr},
     url = {http://archive.numdam.org/item/MSM_1926__12__1_0/}
}