The Study on Structures of CaO-La 2O 3 Catalysts by Fluorescence Emission of Eu 3+
Ji Min, Bi Ying-Li, Zhen Kai-Ji, Xu Yu-Hua, Wei Quan
Acta Phys. -Chim. Sin. . 1995, (02): 175 -179 .  DOI: 10.3866/PKU.WHXB19950216