Mingliang Yang, Zeyuan Xiang, XiJun Xu, Chongren Gao, Liqin Guo, Fei Chen. 2021. “Comparison and Analysis of Logistics Ring Track in Plant Area”. Design Engineering 2021 (02), 421 -33. http://thedesignengineering.com/index.php/DE/article/view/1176.