@article{GDZPPN00239216X,
title = {Wreath products and varieties of groups.},
journal = {Mathematische Zeitschrift},
volume = {78},
year = {1962},
pages = {44-62},
zbl = {0105.02003},
url = {http://dml.mathdoc.fr/item/GDZPPN00239216X}
}
Neumann, B.H.; Neumann, Hanna; Neumann, Peter M. Wreath products and varieties of groups.. Mathematische Zeitschrift, Tome 78 (1962) pp. 44-62. http://gdmltest.u-ga.fr/item/GDZPPN00239216X/