ATTAEV, A.Kh. On Problem of Internal Boundary Control for String Vibration Equation. Bulletin of the Karaganda University. Mathematics Series, [S. l.], v. 101, n. 1, p. 4–10, 2021. DOI: 10.31489/2021m1/4-10. Disponível em: http://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/406. Acesso em: 10 jul. 2025.