@article{1256049418,
author = {Westman, Joel J.},
title = {Skew products and the similarity of virtual subgroups},
journal = {Illinois J. Math.},
volume = {21},
number = {4},
year = {1977},
pages = { 332-346},
language = {en},
url = {http://dml.mathdoc.fr/item/1256049418}
}
Westman, Joel J. Skew products and the similarity of virtual subgroups. Illinois J. Math., Tome 21 (1977) no. 4, pp. 332-346. http://gdmltest.u-ga.fr/item/1256049418/