@article{1256047939,
author = {Stong, R. E.},
title = {Semi-free group actions},
journal = {Illinois J. Math.},
volume = {23},
number = {4},
year = {1979},
pages = { 666-680},
language = {en},
url = {http://dml.mathdoc.fr/item/1256047939}
}
Stong, R. E. Semi-free group actions. Illinois J. Math., Tome 23 (1979) no. 4, pp. 666-680. http://gdmltest.u-ga.fr/item/1256047939/