I. Y. Kmit, L. Recke, and V. I. Tkachenko, “Robustness of exponential dichotomies of boundary-value problems for general first-order hyperbolic systems”, Ukr. Mat. Zhurn., vol. 65, no. 2, pp. 236–251, Feb. 2013, Accessed: Apr. 23, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/2415