Heteropolyanion-based ionic liquids catalyze esterification of ammonium succinate in aqueous solution
ZHANG Feng, LIANG Jinhua, HU Xi, WANG Junge, CHEN Liulong, REN Xiaoqian, JIANG Min
CIESC Journal . 2015, (7): 2488 -2497 .  DOI: 10.11949/j.issn.0438-1157.20150131