We prove a scale-invariant boundary Harnack principle in inner uniform domains in the context of non-symmetric local, regular Dirichlet spaces. For inner uniform Euclidean domains, our results apply to divergence form operators that are not necessarily symmetric, and complement earlier results by H. Aikawa and A. Ancona.
"Scale-invariant boundary Harnack principle in inner uniform domains." Osaka J. Math. 51 (3) 619 - 657, July 2014.