Journal of Experimental and Theoretical Physics
Resonant and Nonresonant Processes of Excitation Energy Transfer from Tu 3+ or Ho 3+ Ions to the Er 3+ Ions in (Y, Er) 3 Al 5 O 12 Crystals
Georgii M. Zverev, G. Ya. Kolodnyǐ, А. М. Онищенко
Journal of Experimental and Theoretical Physics
Georgii M. Zverev, G. Ya. Kolodnyǐ, А. М. Онищенко