@article{1255631588, author = {Snapper, Ernst}, title = {Monotone behavior of cohomology groups under proper mappings}, journal = {Illinois J. Math.}, volume = {5}, number = {1}, year = {1961}, pages = { 666-680}, language = {en}, url = {http://dml.mathdoc.fr/item/1255631588} }
Snapper, Ernst. Monotone behavior of cohomology groups under proper mappings. Illinois J. Math., Tome 5 (1961) no. 1, pp. 666-680. http://gdmltest.u-ga.fr/item/1255631588/