1. Th. Förster, Ann. Physik 2, 55 (1948).ANPYA20003-3804
2. Th. Förster, Z. Naturforsch. 4a, 321 (1949).ZENAAU0044-3166
3. M. Inokuti and F. Hirayama, J. Chem. Phys. 43, 1978 (1965).JCPSA60021-9606
4. V. L. Ermolaev and E. B. Sveshnikova, Bull. Acad. Sci. USSR, Phys. Ser. (English Transl.) 26, 29 (1962).BUPSAA0001-432X
5. V. L. Ermolaev and E. B. Sveshnikova, Opt. Spectry. 16, 320 (1964).OPSUA30030-400X