@book{MSM_1938__91__1_0,
     author = {De S\'eguier and Potron},
     title = {Th\'eorie des groupes abstraits},
     series = {M\'emorial des sciences math\'ematiques},
     publisher = {Gauthier-Villars},
     number = {91},
     year = {1938},
     zbl = {0022.11702},
     language = {fr},
     url = {http://www.numdam.org/item/MSM_1938__91__1_0/}
}