“Integrated Optimization of Heterogeneous Fleet Deployment, Sailing Speed, and Bunkering Strategy Considering Adaptive Safety Stock”, J. Tek. Ind. J. Keilmuan dan Apl. Tek. Ind., vol. 28, no. 1, pp. 59–74, Apr. 2026, doi: 10.9744/jti.28.1.59-75.