@article{MZ_1971__123_171647,
     author = {Luis Ribes},
     title = {On {Amalgamated} {Products} of {Profinite} {Groups.}},
     journal = {Mathematische Zeitschrift},
     pages = {357--364},
     publisher = {mathdoc},
     volume = {123},
     year = {1971},
     zbl = {0218.20031},
     url = {http://geodesic.mathdoc.fr/item/MZ_1971__123_171647/}
}