Phung, Duy Quang, Anh Tuan Pham, and Thi Xuan Thu Nguyen. 2018. “INTRA-ASEAN TRADE – GRAVITY MODEL AND SPATIAL HAUSMAN-TAYLOR APPROACH”. Journal of International Economics and Management, no. 101 (January):68-82. https://jiem.ftu.edu.vn/index.php/jiem/article/view/184.