Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{PORMA_1967__26_4_115046, author = {Morgado, Jos\'e}, title = {A theorem on entropic groupoids}, journal = {Portugaliae mathematica}, pages = {449--452}, publisher = {mathdoc}, volume = {26}, number = {4}, year = {1967}, mrnumber = {0255715}, zbl = {0208.29601}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PORMA_1967__26_4_115046/} }
Morgado, José. A theorem on entropic groupoids. Portugaliae mathematica, Tome 26 (1967) no. 4, pp. 449-452. http://geodesic.mathdoc.fr/item/PORMA_1967__26_4_115046/