@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/