Effects of different chemical additives on biodiesel fuel properties and engine performance. A comparison reviewObed Majeed Ali, Rizalman Mamat, Nik R. Abdullah, Abdul Adam Abdullah, Fitri Khoerunnisa and Ratnaningsih Eko SardjonoMATEC Web of Conferences, 38 (2016) 03002DOI: https://doi.org/10.1051/matecconf/20163803002