@article{GDZPPN002441675, title = {Length spectrum invariants of Riemannian manifolds.}, journal = {Mathematische Zeitschrift}, volume = {212}, year = {1993}, pages = {311-352}, zbl = {0804.53068}, url = {http://dml.mathdoc.fr/item/GDZPPN002441675} }
Popov, Georgi S. Length spectrum invariants of Riemannian manifolds.. Mathematische Zeitschrift, Tome 212 (1993) pp. 311-352. http://gdmltest.u-ga.fr/item/GDZPPN002441675/