1. House, H.O., Modern Synthetic Reactions, Menlo Park, Calif.: Benjamin, 1972, p. 595.
2. Bergman, E.D., Organic Reactions, New York: Wiley, 1959, vol. 10, p. 191.
3. Royals, E.A., Adv. Org. Chem., New York: Prentice Hall, 1958, p. 794.
4. Markisz, J.A. and Getller, J.D., Can. J. Chem., 1967, vol. 47, p. 1965.
5. Bernasconi, C.F. and Killon, R.B., J. Org. Chem., 1989, vol. 54, p. 2827.