@article{1200692692,
author = {Tollefson, Jeffrey L.},
title = {Free involutions on non-prime 3-manifolds},
journal = {Osaka J. Math.},
volume = {7},
number = {1},
year = {1970},
pages = { 161-164},
language = {en},
url = {http://dml.mathdoc.fr/item/1200692692}
}
Tollefson, Jeffrey L. Free involutions on non-prime 3-manifolds. Osaka J. Math., Tome 7 (1970) no. 1, pp. 161-164. http://gdmltest.u-ga.fr/item/1200692692/