1. For an overview, see: (a) F.E. Bailey Jr., J.V. Koleske, Alkylene Oxides and Their Polymers, Surfactant Science Series 35, Marcel Dekker, New York, 1991, Chapter 4.
2. (b) K.C. Frisch, S.L. Regen, Ring-Opening Polymerization, Marcel Dekker, New York, 1969, Chapter 1.
3. For example: (a) T. Sârbu, E.J. Beckman, Macromolecules 32 (1999) 6904.
4. (b) P. Conde, L. Hocks, P. Tessie, R. Warin, in: E.J. Vandenberg, J.C. Salamone (Eds.), Catalysis in Polymer Synthesis, ACS Symposium Series 496, American Chemical Society, Washington, DC, 1992, Chapter 11.