@article{MZ_1971__120_171534,
     author = {R.B.J.T. Allenby and R.J. Gregorac},
     title = {Generalised {Free} {Products} which are {Free} {Products} of {Locally} {Extended} {Residually} {Finite} {Groups.}},
     journal = {Mathematische Zeitschrift},
     pages = {323--325},
     publisher = {mathdoc},
     volume = {120},
     year = {1971},
     zbl = {0204.34401},
     url = {http://geodesic.mathdoc.fr/item/MZ_1971__120_171534/}
}