OSYPCHUK, M.M. On the number of crossings of some levels by a sequence of diffusion processes. **Carpathian Mathematical Publications**, *[S. l.]*, v. 1, n. 2, p. 191–196, 2009. Disponível em: https://journals.pnu.edu.ua/index.php/cmp/article/view/4014. Acesso em: 23 may. 2024.