THANG, DR. TRAN DUC, et al. “Financial Risk Management via Evaluating Impacts of a Six Factor Model on Hoi an Tourist Holding Company Stock Price and Transparency disclosure– a Case in Tourism Industry in Vietnam”. The Journal of Contemporary Issues in Business and Government, vol. 27, no. 2, Apr. 2021, pp. 981-5, http://www.cibgp.com/index.php/1323-6903/article/view/1008.