DaPrato G. “Regularity Results for Kolmogorov Equations in $L^2 (H, μ)$ Spaces and Applications”. Ukrains’kyi Matematychnyi Zhurnal 49, no. 3 (March 25, 1997): 448–457. Accessed July 27, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/5017.