[3] Aierken Sidike, Keyoumu Niyazi, Zhu Hengjiang, et al. Phys. Chem. Miner, 2009, 36: 119.
[4] Aierken Sidike, Rahman Abu Zayed Mohammad Saliqur, He Juiyang, et al. Journal of Luminescence, 2009, 129: 1271.
[6] Xiao Luanliang, Chao Fengzhu, Yun Xiayang, et al. Journal of Luminescence, 2008, 128: 1162.
[7] Jun Zhangzhi, Lin Yuanjun, Hong Chenhao. Solid State Sciences, 2009, 11: 549.
[8] Eiichiro N. Journal of Luminescence, 2002, 100: 89.
[9] Ivanovskikh K V, Pustovarov V A, Shulgin B V. Russian Physics Journal, 2005, 48(9): 984.
[10] Guo Caihan, Yu huawang, Chun fangwu. Materials Research Bulletin, 2009, 44: 2255.
[11] Dorenbos P. J. Lumin., 2000, 91: 91.
[12] Jiu Pingzhong, Hong Binliang, Bing Han. Optcs Express, 2008, 16(10): 7508.
[13] Qiang Su, Hong Binliang, Cheng Yuli. Journal of Luminescence, 2007, 122: 927.
[16] Yan Bing, Wang Chong. Journal of Alloys and Compounds, 2008, 462: 147.
[17] Gou Jing, Wang Yuhua, Li Feng. Journal of Luminescence, 2008, 128: 728.