@article{1230395704,
author = {NAKAOKA, Minoru},
title = {The mod $2$ semicharacteristic and groups acting freely on manifolds},
journal = {J. Math. Soc. Japan},
volume = {37},
number = {4},
year = {1985},
pages = { 165-172},
language = {en},
url = {http://dml.mathdoc.fr/item/1230395704}
}
NAKAOKA, Minoru. The mod $2$ semicharacteristic and groups acting freely on manifolds. J. Math. Soc. Japan, Tome 37 (1985) no. 4, pp. 165-172. http://gdmltest.u-ga.fr/item/1230395704/