Putra, P. K. D. N. Y., B. H. Iskandar, and Y. Novita. “Using Length of Bilge Keel to Length of Waterline Ratio to Reduce Ship Rolling Motion”. Engineering, Technology & Applied Science Research 8, no. 2 (April 19, 2018): 2731–2734. Accessed September 29, 2021. https://etasr.com/index.php/ETASR/article/view/1861.