@article{GDZPPN002442094, title = {Eigenvalue stability bounds via weighted Sobolov spaces.}, journal = {Mathematische Zeitschrift}, volume = {212}, year = {1993}, pages = {357-372}, zbl = {0799.58082}, url = {http://dml.mathdoc.fr/item/GDZPPN002442094} }
Davies, E.B. Eigenvalue stability bounds via weighted Sobolov spaces.. Mathematische Zeitschrift, Tome 212 (1993) pp. 357-372. http://gdmltest.u-ga.fr/item/GDZPPN002442094/