@article{GDZPPN002418061, title = {Growth of Jacobi Fields and Divergence of Geodesics.}, journal = {Mathematische Zeitschrift}, volume = {147}, year = {1976}, pages = {221-238}, url = {http://dml.mathdoc.fr/item/GDZPPN002418061} }
Eschenburg, J.-H.; O'Sullivan, J.J. Growth of Jacobi Fields and Divergence of Geodesics.. Mathematische Zeitschrift, Tome 147 (1976) pp. 221-238. http://gdmltest.u-ga.fr/item/GDZPPN002418061/