@article{1077307679,
author = {Lalley, Steven P.},
title = {Closed geodesics in homology classes on surfaces of variable
negative curvature},
journal = {Duke Math. J.},
volume = {58},
number = {1},
year = {1989},
pages = { 795-821},
language = {en},
url = {http://dml.mathdoc.fr/item/1077307679}
}
Lalley, Steven P. Closed geodesics in homology classes on surfaces of variable
negative curvature. Duke Math. J., Tome 58 (1989) no. 1, pp. 795-821. http://gdmltest.u-ga.fr/item/1077307679/