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Bingfu Lei; Yingliang Liu; Junwen Zhang; Jianxin Meng; Shiqing Man; Shaozao Tan. (2010). Persistent luminescence in rare earth ion-doped gadolinium oxysulfide phosphors. , 495(1), 0–253. doi:10.1016/j.jallcom.2010.01.141 

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