BogdanskiiY. V. Laplacian with respect to a measure on a Hilbert space and an <i>L </i><sub>2</sub&gt;-version of the Dirichlet problem for the Poisson equation. Ukrains’kyi Matematychnyi Zhurnal, v. 63, n. 9, p. 1169-1178, 25 Sep. 2011.