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@article{MZ_1974__136_172028, author = {Alfred Pietrowski}, title = {The {Isomorphism} {Problem} for {One-relator} {Groups} with {Non-trivial} {Centre.}}, journal = {Mathematische Zeitschrift}, pages = {95--106}, publisher = {mathdoc}, volume = {136}, year = {1974}, zbl = {0264.20029}, url = {http://geodesic.mathdoc.fr/item/MZ_1974__136_172028/} }
Alfred Pietrowski. The Isomorphism Problem for One-relator Groups with Non-trivial Centre.. Mathematische Zeitschrift, Tome 136 (1974), pp. 95-106. http://geodesic.mathdoc.fr/item/MZ_1974__136_172028/