1. Furukawa, J., and T. Saegusa: Polymerization of aldehydes and oxides. New York: Interscience Publishers 1963.
2. Farthing, A. C.: Polymers from 1,3-and higher epoxides in high polymers. Vol. XIII, Chapter V. Polyethers Part I. Polyalkylene oxides and other polyethers. Ed. by N. G. Gaylord. New York: Interscience Publishers 1963.
3. Meerwein, H., D. Delfs, and H. Morshel: Angew. Chem. 72, 927 (1960).
4. Wurtz, A.: Ann. Chim. Phys. 69, 330 (1863); as cited in Reference 1, p. 125.
5. Meerwein, H., D. Delfs, and H. Morshel: Angew. Chem 72, 927 (1960).