Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{CMH_1954__28_139088, author = {B. Eckmann}, title = {R\"aume mit {Mittelbildungen.}}, journal = {Commentarii mathematici Helvetici}, pages = {329--340}, publisher = {mathdoc}, volume = {28}, year = {1954}, zbl = {0056.16403}, url = {http://geodesic.mathdoc.fr/item/CMH_1954__28_139088/} }
B. Eckmann. Räume mit Mittelbildungen.. Commentarii mathematici Helvetici, Tome 28 (1954), pp. 329-340. http://geodesic.mathdoc.fr/item/CMH_1954__28_139088/