@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/}
}