TT Phuc, Nguyen, Lin Crase, and Thi Thu Ha Nguyen. 2016. “Relationship Between Intra-Firm Logistics Integration and Transaction Costs: An Empirical Study of International Multimodal Transport Companies in Vietnam”. Journal of International Economics and Management, no. 83 (April):35-53. https://jiem.ftu.edu.vn/index.php/jiem/article/view/146.