Heydari, Mohammad, Zhou Xiaohu, Kin Keung Lai, and Zheng Yuxi. “THE EFFECT OF SYSTEMIC RISK ON CORPORATE RETURNS”. Proceedings of National Aviation University 85, no. 4 (December 22, 2020): 54–66. Accessed May 4, 2024. https://jrnl.nau.edu.ua/index.php/visnik/article/view/15139.