Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{SF_1976__12_134178, author = {K. Sigmon and H.-T. Hu}, title = {Continuously factorable groupoids.}, journal = {Semigroup forum}, pages = {251--264}, publisher = {mathdoc}, volume = {12}, year = {1976}, zbl = {0327.22002}, url = {http://geodesic.mathdoc.fr/item/SF_1976__12_134178/} }
K. Sigmon; H.-T. Hu. Continuously factorable groupoids.. Semigroup forum, Tome 12 (1976), pp. 251-264. http://geodesic.mathdoc.fr/item/SF_1976__12_134178/