1. 1) Phosphor Handbook 2nd Edition, Ed. by W. M. Yen, S. Shionoya and H. Yamamoto, CRC Press, Boca Raton, USA (2007).
2. 2) G. Blasse, Prog. Solid State Ch., 18, 79–171 (1988).
3. 3) C. Feldmann, T. Justel, C. R. Ronda and P. J. Schmidt, Adv. Funct. Mater., 13, 511–516 (2003).
4. 4) F. Farges, Y. Lefrere, S. Rossano, A. Berthereau, G. Calas and G. E. Brown, J. Non-Cryst. Solids, 344, 176–188 (2004).
5. 5) I. Nakai, C. Numako, H. Hosono and K. Yamasaki, J. Am. Ceram. Soc., 82, 689–695 (1999).