Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{MASLO_2006__56_5_a4, author = {Foulis, David J.}, title = {Sharp and fuzzy elements of an {RC-group}}, journal = {Mathematica slovaca}, pages = {525--541}, publisher = {mathdoc}, volume = {56}, number = {5}, year = {2006}, mrnumber = {2293585}, zbl = {1141.06017}, language = {en}, url = {http://geodesic.mathdoc.fr/item/MASLO_2006__56_5_a4/} }
Foulis, David J. Sharp and fuzzy elements of an RC-group. Mathematica slovaca, Tome 56 (2006) no. 5, pp. 525-541. http://geodesic.mathdoc.fr/item/MASLO_2006__56_5_a4/