@article{MZ_1976__146_172292,
     author = {Stephen J. Pride},
     title = {Certain {Subgroups} of {Certain} {One-Relator} {Groups.}},
     journal = {Mathematische Zeitschrift},
     pages = {1--6},
     year = {1976},
     volume = {146},
     zbl = {0302.20032},
     url = {http://geodesic.mathdoc.fr/item/MZ_1976__146_172292/}
}