BogdanskiiY. V., & SanzharevskiiY. Y. (2014). The Dirichlet Problem with Laplacian with Respect to a Measure in the Hilbert Space. Ukrains’kyi Matematychnyi Zhurnal, 66(6), 733–739. Retrieved from https://umj.imath.kiev.ua/index.php/umj/article/view/2174