1. V A. Bloomfield, D. M. Crothers, and I. Tinoco, Jr, Physical Chemistry of Nucleic Acids. Harper & Row, N.Y-Evanston-San Francisco-London (1974).
2. C. R. Cantor & P. R. Schimmel, Biophysical Chemistry, parts I, II and III. W H. Freeman and Co., San Francisco (1980).
3. W. Saenger, Principles of Nucleic Acid Structure. Springer Verlag, New York (1984).
4. W. Guschelbauer (1988), Polynucleotides, in: Encyclopedia of Polymer Science and Engineering. Vol. 12, John Wiley & Sons, Inc., New York, pp. 699-785 (1988).