1. V. Ya. Shlyapintokh and V. B. Ivanov, Usp. Khim.,65, No. 2, 201–223 (1976).
2. A. S. Cherkasov and T. M. Vember, Opt. Spektrosk.,6, No. 4, 503–511 (1959).
3. Ch. Dufraisse and I. Gullet, C. R. Acad. Sci.,225, No. 2, 191–192 (1947).
4. Ch. Dufraisse and J. Gerard, Bull. Soc. Chim. France,4, No. 10, 2052–2063 (1937).
5. J. Calvert and J. Pitts, Photochemistry [Russian translation], Moscow (1968).