1. Schrödinger operators with singular potentials;Devinatz;J. Operator Theory,1980
2. Uniqueness of solutions to -Δ-qu = O;Jensen;Comm. Partial Differential Equations,1978
3. Remarks on pseudo-resolvents and infinitesimal generators of semigroups;Kato;Proc. Japan Acad.,1959
4. Schrödinger operators with singular potentials;Kato;Israel J. Math,1972
5. Perturbation theory for linear operators;Kato,1980