Investigation of Water-in-Biodiesel Emulsion Characteristics Produced by Ultrasonic HomogenizerZainal Ambri Abdul Karim, Degen Tee, Mohammed Yahaya Khan and Ftwi Yohaness HagosMATEC Web Conf., 225 (2018) 01012DOI: https://doi.org/10.1051/matecconf/201822501012