@article{GDZPPN002062593, title = {Flat manifolds with non-zero Euler characteristics.}, journal = {Commentarii mathematici Helvetici}, volume = {52}, year = {1977}, pages = {453-456}, zbl = {0357.53021}, url = {http://dml.mathdoc.fr/item/GDZPPN002062593} }
Smillie, John. Flat manifolds with non-zero Euler characteristics.. Commentarii mathematici Helvetici, Tome 52 (1977) pp. 453-456. http://gdmltest.u-ga.fr/item/GDZPPN002062593/