ValeyevK. G. and DzhalladovaI. A. (2002) “Derivation of Moment Equations for Solutions of a System of Differential Equations Dependent on a Semi-Markov Process”, Ukrains’kyi Matematychnyi Zhurnal, 54(11), pp. 1569-1573. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/4193 (Accessed: 27July2024).