SamoilenkoA. M., SlyusarchukV. E. and SlyusarchukV. V. (1997) “Investigation of a nonlinear difference equation in a Banach space in a neighborhood of a quasiperiodic solution”, Ukrains’kyi Matematychnyi Zhurnal, 49(12), pp. 1661–1676. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/5171 (Accessed: 27July2024).