T. SAENGSANGA, W. SIRIPORNADULSIL, and S. SIRIPORNADULSIL, “Characterization of A Lipopeptide Surfactant From Lipase-Producing Bacillus amyloliquefaciens E1PA and Its Role in Lipase-Catalyzed Oil Hydrolysis”, Walailak J Sci & Tech, vol. 15, no. 12, pp. 841–855, Aug. 2017.