“Bayesian-Optimized Gaussian Process Regression for Robust Prediction of Biodiesel–Alcohol Blend Density under Thermophysical Group-Based Validation”, J. Tek. Ind. J. Keilmuan dan Apl. Tek. Ind., vol. 28, no. 2, pp. 152–163, Oct. 2026, doi: 10.9744/jti.28.2.%p.