Jafari, H. ., N. . Saeidi, Amerkaabi, E. . Noshadi, and H. R. . Hallafi. “An Empirical Study of Factors Affecting Reduction of Performance in Container Handling Operation”. Journal of Asian Business Strategy, vol. 3, no. 12, Dec. 2013, pp. 330-9, https://archive.aessweb.com/index.php/5006/article/view/4114.