@article{GDZPPN002312050, title = {Spectral Analysis of the Laplacian in Domains with Cylinders.}, journal = {Mathematische Annalen}, volume = {217}, year = {1975}, pages = {229-252}, zbl = {0313.35060}, url = {http://dml.mathdoc.fr/item/GDZPPN002312050} }
Lyford, William C. Spectral Analysis of the Laplacian in Domains with Cylinders.. Mathematische Annalen, Tome 217 (1975) pp. 229-252. http://gdmltest.u-ga.fr/item/GDZPPN002312050/