yihua, liu, and Xiao Yingjie. 2014. “Model and Application of Risk Degree for Vessel-Bridge Collision Based on Theory of Ship Collision Avoidance”. International Journal of Sciences: Basic and Applied Research (IJSBAR) 14 (1): 574-85. https://www.gssrr.org/JournalOfBasicAndApplied/article/view/2050.