@article{1178241080, author = {Klingenberg, Wilhelm}, title = {The index theorem for closed geodesics}, journal = {Tohoku Math. J. (2)}, volume = {26}, number = {4}, year = {1974}, pages = { 573-579}, language = {en}, url = {http://dml.mathdoc.fr/item/1178241080} }
Klingenberg, Wilhelm. The index theorem for closed geodesics. Tohoku Math. J. (2), Tome 26 (1974) no. 4, pp. 573-579. http://gdmltest.u-ga.fr/item/1178241080/