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@article{MZ_1974__137_172076, author = {J.S. Williams}, title = {Nielsen {Equivalence} of {Presentations} of {Some} {Solvable} {Groups.}}, journal = {Mathematische Zeitschrift}, pages = {351--362}, publisher = {mathdoc}, volume = {137}, year = {1974}, zbl = {0275.20093}, url = {http://geodesic.mathdoc.fr/item/MZ_1974__137_172076/} }
J.S. Williams. Nielsen Equivalence of Presentations of Some Solvable Groups.. Mathematische Zeitschrift, Tome 137 (1974), pp. 351-362. http://geodesic.mathdoc.fr/item/MZ_1974__137_172076/