@article{ASENS_1953_3_70_4_361_0,
     author = {Croisot, Robert},
     title = {Demi-groupes inversifs et demi-groupes r\'eunions de demi-groupes simples},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {361--379},
     publisher = {Elsevier},
     volume = {3e s{\'e}rie, 70},
     number = {4},
     year = {1953},
     doi = {10.24033/asens.1015},
     mrnumber = {15,680e},
     zbl = {0053.00902},
     language = {fr},
     url = {http://www.numdam.org/articles/10.24033/asens.1015/}
}