Kolyada, S. F. “LI-Yorke Sensitivity and Other Concepts of Chaos”. Ukrains’kyi Matematychnyi Zhurnal 56, no. 8 (August 25, 2004): 1043–1061. Accessed May 30, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/3821.