1. Brues, A. M., and Barron, E. S. G., “Ann. Rev. Biochem.”, 20, 350 (1951).
2. Oppenheimer, B. S., Oppenheimer, E. T., Stout, A. P., Danishefsky, I., and Eirch, F. R., Science, 118, 783 (1953).
3. Oppenheimer, B. S., Oppenheimer, E. T., Stout, A. P., Danishefsky, I., and Eirch, F. R., Cancer Research, 15, 333 (1955).
4. Ingram, D. J. E., “Spectroscopy at Radio and Microwave Frequencies”, 96 (Butterworths, London, 1955).
5. Ingram, D. J. E., and Tapley, J. G., Chem. and Indust., 568 (1955).