@article{MZ_1984__186_173462,
     author = {John S. Wilson and Chiara Tamburini},
     title = {A {Residual} {Property} of {Certain} {Free} {Products.}},
     journal = {Mathematische Zeitschrift},
     pages = {525--530},
     publisher = {mathdoc},
     volume = {186},
     year = {1984},
     zbl = {0545.20019},
     url = {http://geodesic.mathdoc.fr/item/MZ_1984__186_173462/}
}