1. Hall HK, Snow LG (1984) Ring-opening Polymerizations via Carbon-Carbon ?-Bond Cleavage. In: Ivin KJ, Saegusa T (eds) Ring-Opening Polymerization. Elsevier, London
2. Cho I, Kim J-B (1980) J. Polym. Sci., Part A: Polym. Chem. 18: 3053
3. Cho I, Ahn K-D (1979) J. Polym. Sci., Part A: Polym. Chem. 17: 3183
4. Szabo GT, Aranyosi K, Csiba M, Toke L (1987) Synthesis 738
5. Stewart JM, Westberg HH (1965) J. Org. Chem. 30: 1951