Voir la notice de l'article provenant de la source Novi sad journal of mathematics website
@article{NSJOM_2004_34_2a_9, author = {J. Koppitz}, title = {Hypersubstitutions and groups}, journal = {Novi Sad Journal of Mathematics}, pages = {127-139}, publisher = {mathdoc}, volume = {34}, number = {2}, year = {2004}, url = {http://geodesic.mathdoc.fr/item/NSJOM_2004_34_2a_9/} }
J. Koppitz. Hypersubstitutions and groups. Novi Sad Journal of Mathematics, Tome 34 (2004) no. 2. http://geodesic.mathdoc.fr/item/NSJOM_2004_34_2a_9/