Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{IM_1981__65_142845, author = {Karsten Grove and Detlef Gromoll}, title = {On {Metrics} on {S2} {All} of {Whose} {Geodesics} {Are} {Closed.}}, journal = {Inventiones mathematicae}, pages = {175--178}, publisher = {mathdoc}, volume = {65}, year = {1981}, zbl = {0477.53044}, url = {http://geodesic.mathdoc.fr/item/IM_1981__65_142845/} }
Karsten Grove; Detlef Gromoll. On Metrics on S2 All of Whose Geodesics Are Closed.. Inventiones mathematicae, Tome 65 (1981), pp. 175-178. http://geodesic.mathdoc.fr/item/IM_1981__65_142845/