Valeyev KG, Dzhalladova IA. Derivation of Moment Equations for Solutions of a System of Differential Equations Dependent on a Semi-Markov Process. Ukr. Mat. Zhurn. [Internet]. 2002 Nov. 25 [cited 2025 Apr. 7];54(11):1569-73. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/4193