Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MS2_1963__12_165846, author = {Roger C. Lyndon}, title = {Length {Functions} in {Groups.}}, journal = {Mathematica Scandinavica}, pages = {209--234}, publisher = {mathdoc}, volume = {12}, year = {1963}, zbl = {0119.26402}, url = {http://geodesic.mathdoc.fr/item/MS2_1963__12_165846/} }
Roger C. Lyndon. Length Functions in Groups.. Mathematica Scandinavica, Tome 12 (1963), pp. 209-234. http://geodesic.mathdoc.fr/item/MS2_1963__12_165846/