@article{02163687, title = {On the discreteness of the spectra of the Dirichlet and Neumann }, journal = {Abstract and Applied Analysis}, volume = {2004}, year = {2004}, pages = {777-792}, doi = {10.1155/S1085337504311115}, zbl = {1081.34018}, language = {en}, url = {http://dml.mathdoc.fr/item/02163687} }
Benedikt, Jiří. On the discreteness of the spectra of the Dirichlet and Neumann . Abstract and Applied Analysis, Tome 2004 (2004) pp. 777-792. doi : 10.1155/S1085337504311115. http://gdmltest.u-ga.fr/item/02163687/