Shahri, Ach Alfan, et al. “Analysis of Activity Planning In the 2765 Dwt Tanker Repair Process Using the Critical Path Method (Cpm): Shipyard ; Critical Path Method (cpm) ; Project Scheduling”. Indonesian Vocational Research Journal, vol. 2, no. 1, Dec. 2022, pp. 163-72, https://journal.umg.ac.id/index.php/ivrj/article/view/5080.