Albeverio, S., A. Daletskii, and Yu. G. Kondratiev. “Some Examples of Dirichlet Operators Associated With the Actions of Infinite Dimensional Lie Groups”. Methods of Functional Analysis and Topology 4, no. 2 (June 25, 1998): 1–15. Accessed February 4, 2026. https://zen.imath.kiev.ua/index.php/mfat/article/view/57.