@article{02153101, title = {Symbol lengths in Milnor }, journal = {Homology, Homotopy and Applications}, volume = {6}, year = {2004}, pages = {17-31}, zbl = {1069.19004}, language = {en}, url = {http://dml.mathdoc.fr/item/02153101} }
Becher, Karim Johannes; Hoffmann, Detlev W. Symbol lengths in Milnor . Homology, Homotopy and Applications, Tome 6 (2004) pp. 17-31. http://gdmltest.u-ga.fr/item/02153101/