Antoniouk, A.V. and Antoniouk, A.V. (2001) “Higher-Order Relations for Derivatives of Nonlinear Diffusion Semigroups”, Ukrains’kyi Matematychnyi Zhurnal, 53(1), pp. 117–122. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/4227 (Accessed: 5 December 2025).