Amini Khoshalan, H. ., S. . Rahman Torabi, S. . Hadi Hoseinie, and B. . Ghodrati. “An Introduction to RAM Analysis of EPB Tunnel Boring Machine”. Scientific Journal of Pure and Applied Sciences, vol. 3, no. 3, Mar. 2014, pp. 120-7, http://sjournals.com/index.php/sjpas/article/view/926.