ANNUNZIATO, Mario. On the action of a semi-Markov process on a system of differential equations. Mathematical Modelling and Analysis, [S. l.], v. 17, n. 5, p. 650–672, 2012. DOI: 10.3846/13926292.2012.734866. Disponível em: https://journals.vilniustech.lt/index.php/MMA/article/view/4901. Acesso em: 2 jul. 2025.