Bhangwar, S., A. Liquat, M. T. Bhatti, A. A. Laghari, I. Ali Qazi, and M. Ali Khoso. “Comparative Performance Analysis of Compression Ignition Engine Using Biodiesel and LPG As Additive”. American Scientific Research Journal for Engineering, Technology, and Sciences, vol. 45, no. 1, July 2018, pp. 75-83, https://asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/4289.