Kovtun, I. I., and M. N. Feller. “Quasilinear Parabolic Equations With a Lévy Laplacian for Functions of Infinite Number of Variables”. Methods of Functional Analysis and Topology, vol. 14, no. 2, June 2008, pp. 117-23, https://zen.imath.kiev.ua/index.php/mfat/article/view/375.