@book{MSM_1965__158__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 = {158},
     year = {1965},
     mrnumber = {174942},
     zbl = {0124.06201},
     language = {fr},
     url = {http://archive.numdam.org/item/MSM_1965__158__1_0/}
}