@article{MZ_1982__179_173151,
     author = {Kathryn J. Horadam},
     title = {One-Relator {Groups} and the {Lower} {Central} {Series.} {II.} {Invariants} of {One-Relator} {Groups.}},
     journal = {Mathematische Zeitschrift},
     pages = {359--368},
     publisher = {mathdoc},
     volume = {179},
     year = {1982},
     zbl = {0465.20028},
     url = {http://geodesic.mathdoc.fr/item/MZ_1982__179_173151/}
}