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@article{GMJ_2002__9_4_50969, author = {Ellis, G.}, title = {A {Magnus-Witt} type isomorphism for non-free groups.}, journal = {Georgian Mathematical Journal}, pages = {703--708}, publisher = {mathdoc}, volume = {9}, number = {4}, year = {2002}, zbl = {1048.20017}, language = {en}, url = {http://geodesic.mathdoc.fr/item/GMJ_2002__9_4_50969/} }
Ellis, G. A Magnus-Witt type isomorphism for non-free groups.. Georgian Mathematical Journal, Tome 9 (2002) no. 4, pp. 703-708. http://geodesic.mathdoc.fr/item/GMJ_2002__9_4_50969/