@article{GDZPPN002062690, title = {A note on Hayman's theorem on the bass note of a drum.}, journal = {Commentarii mathematici Helvetici}, volume = {52}, year = {1977}, pages = {545-556}, zbl = {0374.52008}, url = {http://dml.mathdoc.fr/item/GDZPPN002062690} }
Osserman, Robert. A note on Hayman's theorem on the bass note of a drum.. Commentarii mathematici Helvetici, Tome 52 (1977) pp. 545-556. http://gdmltest.u-ga.fr/item/GDZPPN002062690/