ElnazarovA. A. (1997) “A criterion of exponential dichotomy for a countable system of differential equations with quasiperiodic coefficients”, Ukrains’kyi Matematychnyi Zhurnal, 49(12), pp. 1717–1722. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/5179 (Accessed: 27July2024).