References

1. A. M. Michelson, The Chemistry of Nucleosides and Nucleotides. Academic Press, N.Y -London (1963).

2. D. M. Brown, in: Comprehensive Biochemistry. Vol. 8, M. Florkin and E. H. Stotz (Eds.), Elsevier, Amsterdam-London-N.Y, pp. 209-269 (1963).

3. D. O. Jordan, The Chemistry of Nucleic Acids. Butterworths, London-Washington, p. 358 (1960).