1. B. D. Berezin, Coordination Compounds of Porphyrins and Phthalocyanines (Wiley, New York, 1981).
2. The Chemistry of Biologically Active Natural Compounds, Ed. by N. A. Preobrazhenskii and R. P. Evstigneeva (Khimiya, Moscow, 1976) [in Russian].
3. L. A. Blyumenfel’d, Hemoglobin and Reversible Oxygen Addition (Sov. Nauka, Moscow, 1957) [in Russian].
4. The Porphyrin Handbook, Ed. by K. M. Kadish, K. M. Smith, and R. Guilard (Academic Press, San Diego, 2000), Vol. 6. doi 10.1021/ja004708p
5. Porphyrins: Structure, Properties, Synthesis, Eds. by K. A. Askarov, B. D. Berezin, and R. P. Evstigneeva (Nauka, Moscow, 1985) [in Russian].