Voir la notice de l'article provenant de la source Novi sad journal of mathematics website
@article{NSJOM_1985_15_1a_16, author = {Dudek Wies{\l}aw A. and Stojakovi\'c Zoran}, title = {On \ensuremath{\sigma}-permutable n-groupoids}, journal = {Novi Sad Journal of Mathematics}, pages = {189-198}, publisher = {mathdoc}, volume = {15}, number = {1}, year = {1985}, url = {http://geodesic.mathdoc.fr/item/NSJOM_1985_15_1a_16/} }
Dudek Wiesław A.; Stojaković Zoran. On σ-permutable n-groupoids. Novi Sad Journal of Mathematics, Tome 15 (1985) no. 1. http://geodesic.mathdoc.fr/item/NSJOM_1985_15_1a_16/