@article{1255380678,
author = {Heller, Alex},
title = {Twisted ranks and Euler characteristics},
journal = {Illinois J. Math.},
volume = {1},
number = {1},
year = {1957},
pages = { 562-564},
language = {en},
url = {http://dml.mathdoc.fr/item/1255380678}
}
Heller, Alex. Twisted ranks and Euler characteristics. Illinois J. Math., Tome 1 (1957) no. 1, pp. 562-564. http://gdmltest.u-ga.fr/item/1255380678/