1. Dirichlet spaces;Beurling;Proc. Natl. Acad. Sci. USA,1959
2. On reflected Dirichlet spaces;Chen;Probab. Theory Related Fields,1992
3. On notions of harmonicity;Chen;Proc. Amer. Math. Soc.,2009
4. Z.-Q. Chen, M. Fukushima, Symmetric Markov Processes, Time Change and Boundary Theory, a Book Manuscript (in press).
5. On unique extension of time changed reflecting Brownian motions;Chen;Ann. Inst. H. Poincaré Probab. Statist.,2009