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@article{MZ_1994__216_4_174647, author = {Jens Heber}, title = {On the geodesics flow of tori without conjugate points.}, journal = {Mathematische Zeitschrift}, pages = {209--216}, publisher = {mathdoc}, volume = {216}, number = {4}, year = {1994}, zbl = {0807.53039}, url = {http://geodesic.mathdoc.fr/item/MZ_1994__216_4_174647/} }
Jens Heber. On the geodesics flow of tori without conjugate points.. Mathematische Zeitschrift, Tome 216 (1994) no. 4, pp. 209-216. http://geodesic.mathdoc.fr/item/MZ_1994__216_4_174647/