Patel, J. M. ., V. M. . Makwana, and R. B. . Rawal. “Effect of Phenol Group Antioxidant on Performance and Emission Characteristics of Variable Compression Ratio Diesel Engine Fuelled With Diesel-Palm Biodiesel Blend”. International Journal of Technical Innovation in Modern Engineering & Science, vol. 4, no. 4, Apr. 2018, pp. 354-6, https://ijtimes.com/index.php/ijtimes/article/view/1918.