Suardi, S., H. Hariyono, F. Mahmuddin, M. R. Alwi, M. U. Pawara, A. Alamsyah, and W. Setiawan. “Effect of Methanol–NaOH Catalyst Variations on the Properties and Engine Performance of B50 Biodiesel from Waste Cooking Oil”. Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering), vol. 15, no. 1, Feb. 2026, pp. 79-89, doi:10.23960/jtepl.v15i1.79-89.