Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MM2_1982__40_154900, author = {Manfred Herrmann and Ulrich Orbanz}, title = {Two {Notes} on {Flatness.}}, journal = {Manuscripta mathematica}, pages = {109--134}, publisher = {mathdoc}, volume = {40}, year = {1982}, zbl = {0525.13012}, url = {http://geodesic.mathdoc.fr/item/MM2_1982__40_154900/} }
Manfred Herrmann; Ulrich Orbanz. Two Notes on Flatness.. Manuscripta mathematica, Tome 40 (1982), pp. 109-134. http://geodesic.mathdoc.fr/item/MM2_1982__40_154900/