Bogdanskii, Y. V., and A. Y. Potapenko. “Laplacian With Respect to Measure on a Riemannian Manifold and Dirichlet Problem. I”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 68, no. 7, July 2016, pp. 897-0, https://umj.imath.kiev.ua/index.php/umj/article/view/1889.