[1] Pavlopoulos Τ G. Opt. Commun., 1978; 24(.2): 170

[2] Guthals D M, Nibler J W. Opt. Commun., 1979; 29: 322

[3] Schmidt W, Schafer F P. Z. Naturforsch, 1967; A22: 1563

[5] Pavlopoulos, Hammond Ρ В. J ACS, 1974; 96(11); 6568

[6] Buettner A Y et al."Proc. International Conf. on Molecular Luminesence", New York, Benjamin, 1979: 403~422