Okada, T., M. Ichiyanagi, E. Yilmaz, T. Suzuki, H. Shiraishi, E. L. R. Ngwompe Souop, E. Widjaja, J. Sutedjo, C. D. Marcelo, F. R. Tjiotijono, G. J. Gotama, and W. Anggono. “The Effect of Ignition Timing on Combustion of Ammonia/Ethanol Mixtures in Spark-Assisted Compression Ignition Engine With a Sub-Chamber”. Journal of Engineering and Technological Sciences, vol. 57, no. 6, Oct. 2025, pp. 735-46, doi:10.5614/j.eng.technol.sci.2025.57.6.1.