TKACHENKO, V. I. On the exponential dichotomy of pulse evolution systems. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 46, n. 4, p. 418–424, 1994. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5739. Acesso em: 17 feb. 2026.