1. A. N. Lazarev,Opt. Spektrosk. 12, No. 1, 60–65 (1962).
2. D. M. Adams, I. R. Gardner,J. Chem. Soc., Dalton Trans., No.14, 1501–1505 (1974).
3. N. B. Belov, B. A. Maksimov, Yu. Z. Nozik, and L. A. Muradyan,Dokl. Akad. Nauk SSSR,139, No. 4, 842–845 (1978).
4. N. V. Logvinenko, M. G. Berger, and G. I. Kulesko, —ibid.,,115, No. 4, 826–829 (1964).
5. M. Maskovits and K. H. Michaelian,J. Chem. Phys.,60, No. 6, 2306–2311 (1978).