Progress in Quantum Electronics · 1996 · 463 citations · 53 references
53
Handbook of chemistry and physics
Journal of the Franklin Institute · 1930 · 11.7K citations
Spectra and Energy Levels of Rare Earth Ions in Crystals
Donald W. Goodwin · Physics Bulletin · 1969 · 1.7K citations
The Spectra of the Doubly and Triply Ionized Rare Earths
G. H. Dieke, H. M. Crosswhite · Applied Optics · 1963 · 1.1K citations