1. A note on Riesz potentials;Adams;Duke Math. J.,1975
2. Sobolev Spaces, vol. 140;Adams,2003
3. Lectures on Elliptic Partial Differential Equations;Ambrosio,2019
4. Lp and Lipschitz estimates for the ∂‾-equation and the ∂‾-Neumann problem;Beals;Ann. Math.,1987
5. Perturbation series for eigenvalues of analytic non-symmetric operators;Butler;Arch. Math.,1959