@article{GDZPPN002106183,
title = {Regularity of measure theoretic entropy for geodesic flows of negative curvature: I.},
journal = {Inventiones mathematicae},
volume = {96},
year = {1989},
pages = {579-590},
zbl = {0671.58021},
url = {http://dml.mathdoc.fr/item/GDZPPN002106183}
}
Knieper, Gerhard; Weiss, Howard. Regularity of measure theoretic entropy for geodesic flows of negative curvature: I.. Inventiones mathematicae, Tome 96 (1989) pp. 579-590. http://gdmltest.u-ga.fr/item/GDZPPN002106183/