A. A. Martynyuk and I. P. Stavroulakis, “Stability analysis with respect to two measures of impulsive systems under structural perturbations”, Ukr. Mat. Zhurn., vol. 51, no. 11, pp. 1476–1484, Nov. 1999, Accessed: Dec. 06, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/4749