ELNAZAROV, A. A. A criterion of exponential dichotomy for a countable system of differential equations with quasiperiodic coefficients. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 49, n. 12, p. 1717–1722, 1997. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5179. Acesso em: 14 apr. 2025.