@article{GDZPPN00046189X,
title = {Riemannian Tori Without Conjugate Points are Flat.},
journal = {Geometric and functional analysis},
volume = {4},
year = {1994},
pages = {259-269},
zbl = {0808.53038},
url = {http://dml.mathdoc.fr/item/GDZPPN00046189X}
}
Burago, D.; Teneblat, K. Riemannian Tori Without Conjugate Points are Flat.. Geometric and functional analysis, Tome 4 (1994) pp. 259-269. http://gdmltest.u-ga.fr/item/GDZPPN00046189X/