Nguyen Dinh Trung, Nguyen Tien Dung, N. T. H. D. T. N. H. L. T. T. H. “ANALYSIS OF CASE TEACHING METHOD IN UNIVERSITIES - AN ECONOMIC CASE STUDY IN PYROLYSIS PROJECT”. Design Engineering, Sept. 2021, pp. 12108- 12119, http://www.thedesignengineering.com/index.php/DE/article/view/4367.