@article{GDZPPN002064243, title = {Curvature, diameter and Betti numbers.}, journal = {Commentarii mathematici Helvetici}, volume = {56}, year = {1981}, pages = {179-195}, language = {en}, url = {http://dml.mathdoc.fr/item/GDZPPN002064243} }
Gromov, Michael. Curvature, diameter and Betti numbers.. Commentarii mathematici Helvetici, Tome 56 (1981) pp. 179-195. http://gdmltest.u-ga.fr/item/GDZPPN002064243/