@article{GDZPPN00206393X,
title = {On the characterizations of flat metrics by the spectrum.},
journal = {Commentarii mathematici Helvetici},
volume = {55},
year = {1980},
pages = {427-444},
zbl = {0448.58027},
url = {http://dml.mathdoc.fr/item/GDZPPN00206393X}
}
Kuwabara, Ruishi. On the characterizations of flat metrics by the spectrum.. Commentarii mathematici Helvetici, Tome 55 (1980) pp. 427-444. http://gdmltest.u-ga.fr/item/GDZPPN00206393X/