Mohd Khathri, Akasyah, et al. “Evaluation of Water-Diesel-Butanol Fuel Blends Under Varying Engine Conditions”. Politeknik & Kolej Komuniti Journal of Engineering and Technology, vol. 11, no. 1, June 2026, pp. 45-56, https://app.mypolycc.edu.my/journal/PMJET/article/view/958.