@article{1029001150, author = {Gray, Alfred}, title = {The volume of a small geodesic ball of a Riemannian manifold.}, journal = {Michigan Math. J.}, volume = {20}, number = {4}, year = {1974}, pages = { 329-344}, language = {en}, url = {http://dml.mathdoc.fr/item/1029001150} }
Gray, Alfred. The volume of a small geodesic ball of a Riemannian manifold.. Michigan Math. J., Tome 20 (1974) no. 4, pp. 329-344. http://gdmltest.u-ga.fr/item/1029001150/