@article{1102978063,
author = {Schoenwaelder, Ulrich},
title = {Centralizers of abelian, normal subgroups of hypercyclic groups.},
journal = {Pacific J. Math.},
volume = {31},
number = {3},
year = {1969},
pages = { 197-208},
language = {en},
url = {http://dml.mathdoc.fr/item/1102978063}
}
Schoenwaelder, Ulrich. Centralizers of abelian, normal subgroups of hypercyclic groups.. Pacific J. Math., Tome 31 (1969) no. 3, pp. 197-208. http://gdmltest.u-ga.fr/item/1102978063/