@article{JOLT_2007_17_3_a2,
     author = {Thomas Kappeler and Enrique Loubet and Peter Topalov},
     title = {Analyticity of {Riemannian} {Exponential} {Maps} on {Diff(T)}},
     journal = {Journal of Lie Theory},
     pages = {481--503},
     year = {2007},
     volume = {17},
     number = {3},
     url = {http://geodesic.mathdoc.fr/item/JOLT_2007_17_3_a2/}
}