@article{GDZPPN002095521,
title = {Harmonic Differentials and Closed Geodesics on a Riemann Surface.},
journal = {Inventiones mathematicae},
volume = {55},
year = {1979},
pages = {193-212},
zbl = {0429.30038},
url = {http://dml.mathdoc.fr/item/GDZPPN002095521}
}
Kudla, Stephen S.; Millson, John J. Harmonic Differentials and Closed Geodesics on a Riemann Surface.. Inventiones mathematicae, Tome 55 (1979) pp. 193-212. http://gdmltest.u-ga.fr/item/GDZPPN002095521/