@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/