1. J K Yu. Economics Situation and Technology Progress of Polytetrahydrofuran[J]. Chemical Propellants & Polymeric Materials, 2006, 4(4):7–11
2. C C Shien, S L Fu, F S Lin, et al. Method for Preparing Polyether Polyol and Copolymer Thereof[P]. US 6313262B1, 2001.11.6
3. J He, T Feng, J Yang, et al. In-site Polymerization of Tetrahydrofuran on HPA/MCM-48[J]. Acta Petrolei Sinica(Petroleum Processing Section), 2002, 18(1):37–41
4. I V Kozhevnikov. Catalysis by Heteropoly Acids and Multicomponent Polyoxometalates in Liquid-phase Reactions[J]. Chem. Rev., 1998, 98(1):171–198
5. A Kukovecz, Z Balogi, Kónya Z, et al. Synthesis, Characterisation and Catalytic Applications of Sol-gel Derived Silica—Phosphotungstic Acid Composites[J]. Appl. Catal. A-Gen., 2002, 228(1–2):83–94