STREKALOV, M. M. APPROXIMATION OF THE TRANSITION FUNCTION. Science and Transport Progress , [S. l.], n. 9, p. 99–101, 2005. DOI: 10.15802/stp2005/19978. Disponível em: https://stp.ust.edu.ua/article/view/19978. Acesso em: 18 may. 2024.