@article{CRMATH_2004__338_7_521_0,
     author = {Hu, Ze-Chun and Ma, Zhi-Ming},
     title = {Beurling{\textendash}Deny formula of {semi-Dirichlet} forms},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {521--526},
     publisher = {Elsevier},
     volume = {338},
     number = {7},
     year = {2004},
     doi = {10.1016/j.crma.2004.01.020},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2004.01.020/}
}