ISKANDAROV, S.; KHALILOVA, G. T. THE lower estimations of solutions of linear VOLTERRA integral-differential equation of fourth order. Journal of Mathematics, Mechanics and Computer Science, [S. l.], v. 76, n. 1, p. 43–52, 2013. Disponível em: https://bm.kaznu.kz/index.php/kaznu/article/view/86. Acesso em: 3 jul. 2024.