12-Tungstophosphoric Acid Supported on Hydrous Zirconia for Ring-open Polymerization of Tetrahydrofuran
LIANG Li-Ping, ZHU Qing, ZHAO Yong-Xiang, LIU Dian-Sheng
Acta Chimica Sinica . 2011, (16): 1881 -1889 .