@book{MSM_1956__133__1_0,
     author = {Heilbronn, Georges},
     title = {Int\'egration des \'equations diff\'erentielles ordinaires par la m\'ethode de {Drach}},
     series = {M\'emorial des sciences math\'ematiques},
     publisher = {Gauthier-Villars},
     number = {133},
     year = {1956},
     mrnumber = {84648},
     zbl = {0071.29801},
     language = {fr},
     url = {http://www.numdam.org/item/MSM_1956__133__1_0/}
}