Saputra, Yuli Mafendro Dedet Eka, et al. “Influence Of The Compression Ratio And Ignition Timing On CB150R Engine Performance With 85% Bioethanol Gasoline Blended Fuel”. IPTEK The Journal of Engineering, vol. 3, no. 3, Sept. 2025, pp. 25-29, doi:10.12962/joe.v3i3.3207.