KORZYUK, V. I.; CHEB, E.S. Cauchy problem for a linear hyperbolic equation of the second order. Mathematical Modelling and Analysis, [S. l.], v. 11, n. 3, p. 275–294, 2006. DOI: 10.3846/13926292.2006.9637318. Disponível em: https://journals.vilniustech.lt/index.php/MMA/article/view/9618. Acesso em: 1 jul. 2025.