Heydari M, Xiaohu Z, Lai KK, Yuxi Z, Chen L. INVESTIGATING THE IMPACT OF CRISIS ON CORPORATE COSTS AND SALES USING ECONOMETRICS METHOD. Proceedings of National Aviation University [Internet]. 2019 Dec. 29 [cited 2024 Apr. 28];81(4):71-85. Available from: https://jrnl.nau.edu.ua/index.php/visnik/article/view/14604