D. R. Adams and L. I. Hedberg, Function Spaces and Potential Theory. Springer, 1996.
 S. Albeverio and Z. M. Ma, Necessary and sufficient conditions for the existence of m-perfect processes associated with Dirichlet forms. Séminaire de Probabilités 25, 374–406; Lecture Notes in Math., vol. 1485. Springer, 1991.
 S. Albeverio and Z. M. Ma, Additive functionals, nowhere Radon and Kato class smooth measures associated with Dirichlet forms. Osaka J. Math. 29(1992), 247–265.
 S. Albeverio, Z. M. Ma, and M. Röckner, Quasi-regular Dirichlet forms and Markov processes. J. Func. Anal. 111 (1993), 118–154.
 R. F. Bass and P. Hsu, Some potential theory for reflecting Brownian motion in Hölder and Lipschitz domains. Ann. Probab. ...