NECESSARY AND SUFFICIENT CONDITIONS OF OPTIMALITY FOR HYPERBOLIC EQUATION WITH NON-LOCAL BOUNDARY CONDITIONS. Journal of Mathematical Analysis, [S. l.], v. 17, n. 01, p. 30–41, 2026. DOI: 10.5281/3kyrgd05. Disponível em: https://scopushub.com/index.php/JMA/article/view/23. Acesso em: 4 aug. 2026.