Le, Thi Thu Ha, and Thi Thu Quynh Ho. “ Relationship Between the Product Differentiation and Firm Performance of Japanese Invested Enterprises (JIEs) in Vietnam”. Journal of International Economics and Management, no. 87 (November 30, 2016): 3-27. Accessed April 16, 2024. https://jiem.ftu.edu.vn/index.php/jiem/article/view/150.