@article{GDZPPN002422573, title = {Groups with One More Generator than Relators.}, journal = {Mathematische Zeitschrift}, volume = {166}, year = {1979}, pages = {279-282}, zbl = {0388.20025}, url = {http://dml.mathdoc.fr/item/GDZPPN002422573} }
Pride, Stephen J.; Baumslag, Benjamin. Groups with One More Generator than Relators.. Mathematische Zeitschrift, Tome 166 (1979) pp. 279-282. http://gdmltest.u-ga.fr/item/GDZPPN002422573/