BUASRI, A.; LERTNIMIT, S.; NISAPRUKSACHART, A.; KHUNKHA, I.; LORYUENYONG, V. Box-Behnken Design for Optimization on Esterification of Free Fatty Acids in Waste Cooking Oil Using Modified Smectite Clay Catalyst. ASEAN Journal of Chemical Engineering, v. 23, n. 1, p. 40-51, 30 Jun. 2023.