CJCU
Ring-opening Polymerization of Aliphatic Cyclic Esters by Using Organic Amino Calcium Catalyst
PIAO Long-Hai , ZHANG Xin-Zhao, CHEN Xue-Si, DENG Ming-Xiao, JIANG Lian-Sheng, JING Xia-Bin 
Chem. J. Chinese Universities . 2003, (2): 346 -349 .