1. B. Perbal, “A Practical Guide to Molecular Cloning,” John Wiley & Sons, New York, 1985.
2. T. Maniatis, E. F. fritsch and J. Sambrook, “Molecular Cloning: A Laboratory Manual,” Cold Spring Harbor Laboratory, Cold Spring Harbor, N.Y., 1982.
3. M. O. Dayhoff, R. M. Schwarz and B. C. Orcutt, “Atlas of Protein Sequence and Structure,” Vol. 5, Suppl. 3, National Biochemical Research Foundation, Washington, D.C., 1978, pp. 518–648.