1. S. V. Kuz'min, in: The Ultramicroanalysis of Nucleic Acids [in Russian], Moscow (1973), p. 95.
2. D. G. Knorre and L. S. Sandakhchiev, in: The Ultramicroanalysis of Nucleic Acids [in Russian], Moscow (1973), p. 7.
3. L. S. Sandakhchiev, in: The Ultramicroanalysis of Nucleic Acids [in Russian], Moscow (1973), p. 77.
4. M. A. Grachev, in: The Ultramicroanalysis of Nucleic Acids [in Russian], Moscow (1973), p. 104.
5. V. V. Vlasov, in: The Ultramicroanalysis of Nucleic Acids [in Russian], Moscow (1973), p. 151.