Surawongtakoon, Panida, Plaichumpon Paha, and Worapan Pormsila. 2018. “Lower Density Solvent-Based Dispersive Liquid-Liquid Microextraction for the Determination of Benzoic Acid”. Research on Modern Science and Utilizing Technological Innovation Journal (RMUTI Journal) 11 (2):14-24. https://ph01.tci-thaijo.org/index.php/rmutijo/article/view/167658.