Voir la notice de l'article provenant de la source Novi sad journal of mathematics website
@article{NSJOM_2004_34_2a_0, author = {S. A. Achache}, title = {A note about the order of an extensive map}, journal = {Novi Sad Journal of Mathematics}, pages = {1-3}, publisher = {mathdoc}, volume = {34}, number = {2}, year = {2004}, url = {http://geodesic.mathdoc.fr/item/NSJOM_2004_34_2a_0/} }
S. A. Achache. A note about the order of an extensive map. Novi Sad Journal of Mathematics, Tome 34 (2004) no. 2. http://geodesic.mathdoc.fr/item/NSJOM_2004_34_2a_0/