Farafisha, H. et al. 2025. Analysis of Ultra Fine Bubble Addition on Biodiesel Fuel to Reduce Emission of Two Wheel Tractors Diesel Engine. Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering). 14, 1 (Jan. 2025), 296–308. DOI:https://doi.org/10.23960/jtep-l.v14i1.296-308.