1. J. Sambrook, E. F. Fritsch, and T. Manitatis, “Molecular Cloning: A Laboratory Mannual,” Cold Spring Harbor Laboratory Press, Cold Spring Harbor, New York, 1989, Chapter 1.
2. J. W. Spinks and R. J. Woods, in “An Introduction to Radiation Chemistry,” John Wiley-Interscience Publication, New York, 1975.