@article{MZ_1973__132_171926,
     author = {Stephen J. Pride},
     title = {Residual {Properties} of {Free} {Groups.} {III.}},
     journal = {Mathematische Zeitschrift},
     pages = {245--248},
     publisher = {mathdoc},
     volume = {132},
     year = {1973},
     zbl = {0251.20028},
     url = {http://geodesic.mathdoc.fr/item/MZ_1973__132_171926/}
}