@book{MSM_1947__105__1_0,
     author = {Humbert, Pierre and Colombo, Serge},
     title = {Le calcul symbolique et ses applications \`a la physique math\'ematique},
     series = {M\'emorial des sciences math\'ematiques},
     publisher = {Gauthier-Villars},
     number = {105},
     year = {1947},
     mrnumber = {25004},
     zbl = {0032.07501},
     language = {fr},
     url = {http://www.numdam.org/item/MSM_1947__105__1_0/}
}