Voir la notice de l'article provenant de la source Novi sad journal of mathematics website
@article{NSJOM_1995_25_2a_17, author = {U\v{s}an Janez}, title = {On n-groups with {i,j}-neutral operation for {i,j}\ensuremath{\neq}{1,n}}, journal = {Novi Sad Journal of Mathematics}, pages = {167-178}, publisher = {mathdoc}, volume = {25}, number = {2}, year = {1995}, url = {http://geodesic.mathdoc.fr/item/NSJOM_1995_25_2a_17/} }
Ušan Janez. On n-groups with {i,j}-neutral operation for {i,j}≠{1,n}. Novi Sad Journal of Mathematics, Tome 25 (1995) no. 2. http://geodesic.mathdoc.fr/item/NSJOM_1995_25_2a_17/