K. Dimapalao, M.-A. “Performance and Emission Characteristics of Ozonated Coconut Oil in a Single-Cylinder, Direct Injection Diesel Engine”. ASIA PACIFIC JOURNAL OF SOCIAL INNOVATION, vol. 26, no. 1, Apr. 2024, pp. 129-68, https://journals.msuiit.edu.ph/tmf/article/view/540.