Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{RCM_1975__9_181636, author = {Harold Bell}, title = {A note on universal maps}, journal = {Revista colombiana de matematicas}, pages = {91--94}, publisher = {mathdoc}, volume = {9}, year = {1975}, zbl = {0321.55020}, url = {http://geodesic.mathdoc.fr/item/RCM_1975__9_181636/} }
Harold Bell. A note on universal maps. Revista colombiana de matematicas, Tome 9 (1975), pp. 91-94. http://geodesic.mathdoc.fr/item/RCM_1975__9_181636/