@book{MSM_1928__27__1_0,
     author = {Appell, Paul},
     title = {Le probl\`eme g\'eom\'etrique des d\'eblais et remblais},
     series = {M\'emorial des sciences math\'ematiques},
     publisher = {Gauthier-Villars},
     number = {27},
     year = {1928},
     language = {fr},
     url = {http://archive.numdam.org/item/MSM_1928__27__1_0/}
}