@article{GDZPPN002068818, title = {Density of states in spectral geometry.}, journal = {Commentarii mathematici Helvetici}, volume = {68}, year = {1993}, pages = {480-493}, zbl = {0787.58042}, url = {http://dml.mathdoc.fr/item/GDZPPN002068818} }
Adachi, T.; Sunada, T. Density of states in spectral geometry.. Commentarii mathematici Helvetici, Tome 68 (1993) pp. 480-493. http://gdmltest.u-ga.fr/item/GDZPPN002068818/