@article{GDZPPN002192853,
title = {Geodesics on the tangent sphere bundles over space forms.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {281},
year = {1976},
pages = {106-120},
zbl = {0333.53031},
url = {http://dml.mathdoc.fr/item/GDZPPN002192853}
}
Sasaki, Shigeo. Geodesics on the tangent sphere bundles over space forms.. Journal für die reine und angewandte Mathematik, Tome 281 (1976) pp. 106-120. http://gdmltest.u-ga.fr/item/GDZPPN002192853/