1. Sobolev Spaces;Adams,1975
2. Function Spaces and Potential Theory;Adams,1996
3. Collectively Compact Operator Approximation Theory and Applications to Integral Equations;Anselone,1971
4. Domain perturbation for the first eigenvalue of the Dirichlet Schrödinger operator;Arendt,1995
5. Non-negative solutions of linear parabolic equations;Aronson;Ann. Scuola Norm. Sup. Pisa,1968