Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{MASLO_1994__44_1_a3, author = {Jasem, Milan}, title = {Weak isometries in directed groups}, journal = {Mathematica slovaca}, pages = {39--43}, publisher = {mathdoc}, volume = {44}, number = {1}, year = {1994}, mrnumber = {1290271}, zbl = {0797.06016}, language = {en}, url = {http://geodesic.mathdoc.fr/item/MASLO_1994__44_1_a3/} }
Jasem, Milan. Weak isometries in directed groups. Mathematica slovaca, Tome 44 (1994) no. 1, pp. 39-43. http://geodesic.mathdoc.fr/item/MASLO_1994__44_1_a3/