@article{GDZPPN002413981,
title = {The Isomorphism Problem for One-relator Groups with Non-trivial Centre.},
journal = {Mathematische Zeitschrift},
volume = {136},
year = {1974},
pages = {95-106},
zbl = {0264.20029},
url = {http://dml.mathdoc.fr/item/GDZPPN002413981}
}
Pietrowski, Alfred. The Isomorphism Problem for One-relator Groups with Non-trivial Centre.. Mathematische Zeitschrift, Tome 136 (1974) pp. 95-106. http://gdmltest.u-ga.fr/item/GDZPPN002413981/