@article{GDZPPN002108844, title = {Curvature, tangentiality, and controlled topology.}, journal = {Inventiones mathematicae}, volume = {104}, year = {1991}, pages = {401-414}, zbl = {0744.57017}, url = {http://dml.mathdoc.fr/item/GDZPPN002108844} }
Ferry, Steven C.; Weinberger, Shmuel. Curvature, tangentiality, and controlled topology.. Inventiones mathematicae, Tome 104 (1991) pp. 401-414. http://gdmltest.u-ga.fr/item/GDZPPN002108844/