Shi Chunshan, Ye Zeren. SPECTRAL STRUCTURE AND VALENCE STABILITY OF EUROPIUM (Ⅱ) IN SYSTEMS <i>AR</i>F<sub>4</sub> (<i>A</i>=Na, K; <i>R</i>=La,Gd,Lu and Y)[J]. Chinese Journal of Luminescence, 1987,8(3): 245-251
Shi Chunshan, Ye Zeren. SPECTRAL STRUCTURE AND VALENCE STABILITY OF EUROPIUM (Ⅱ) IN SYSTEMS <i>AR</i>F<sub>4</sub> (<i>A</i>=Na, K; <i>R</i>=La,Gd,Lu and Y)[J]. Chinese Journal of Luminescence, 1987,8(3): 245-251DOI: