@article{MZ_1973__134_171989,
     author = {R.J. Clarke},
     title = {Projective {Resolutions} for a {Certain} {Class} of {Groups.}},
     journal = {Mathematische Zeitschrift},
     pages = {329--336},
     publisher = {mathdoc},
     volume = {134},
     year = {1973},
     zbl = {0261.20008},
     url = {http://geodesic.mathdoc.fr/item/MZ_1973__134_171989/}
}