no. 2
Restricted subgroups of wreath products of groups
Compositio Mathematica, Tome 33 (1976) no. 2, pp. 209-225. 
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     title = {Restricted subgroups of wreath products of groups},
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     pages = {209--225},
     publisher = {Noordhoff International Publishing},
     volume = {33},
     number = {2},
     year = {1976},
     mrnumber = {424955},
     zbl = {0344.20033},
     language = {en},
     url = {http://archive.numdam.org/item/CM_1976__33_2_209_0/}
}
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Houghton, C. H. Restricted subgroups of wreath products of groups. Compositio Mathematica, Tome 33 (1976) no. 2, pp. 209-225. http://archive.numdam.org/item/CM_1976__33_2_209_0/

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