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@article{MZ_1978__158_172621, author = {Norbert Peczynski and Wolfram Reiwer}, title = {On {Cancellations} in {HNN-Groups.}}, journal = {Mathematische Zeitschrift}, pages = {79--86}, publisher = {mathdoc}, volume = {158}, year = {1978}, zbl = {0352.20025}, url = {http://geodesic.mathdoc.fr/item/MZ_1978__158_172621/} }
Norbert Peczynski; Wolfram Reiwer. On Cancellations in HNN-Groups.. Mathematische Zeitschrift, Tome 158 (1978), pp. 79-86. http://geodesic.mathdoc.fr/item/MZ_1978__158_172621/