Kovtun, I.I. and Feller, M.N. (2010) “Boundary-value problems for a nonlinear parabolic equation with Lévy Laplacian resolved with respect to the derivative”, Ukrains’kyi Matematychnyi Zhurnal, 62(10), pp. 1400–1407. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/2964 (Accessed: 5 December 2025).