@article{GDZPPN00209861X,
title = {Diffeomorphisms of the Circle and Geodesic Fields on Riemannian Surfaces of Genus One.},
journal = {Inventiones mathematicae},
volume = {69},
year = {1982},
pages = {229-242},
zbl = {0508.58010},
url = {http://dml.mathdoc.fr/item/GDZPPN00209861X}
}
Langer, Joel; Singer, David A. Diffeomorphisms of the Circle and Geodesic Fields on Riemannian Surfaces of Genus One.. Inventiones mathematicae, Tome 69 (1982) pp. 229-242. http://gdmltest.u-ga.fr/item/GDZPPN00209861X/