Chitatat Numnim และ Chawalit Ngamcharussrivichai. (2011) Layered zeolites intercalated with quaternary ammonium salts as catalysts for esterification of glycerol. Chulalongkorn University:ม.ป.ท.Chitatat Numnim และ Chawalit Ngamcharussrivichai. 2011. Layered zeolites intercalated with quaternary ammonium salts as catalysts for esterification of glycerol. ม.ป.ท.:Chulalongkorn University;Chitatat Numnim และ Chawalit Ngamcharussrivichai. Layered zeolites intercalated with quaternary ammonium salts as catalysts for esterification of glycerol. ม.ป.ท.:Chulalongkorn University, 2011. Print.