[1]R.B. Chessler, J.E. Geusic, Solid-state ionic lasers, in: F.T. Arrechi, E.O. Schulz- DuBois (Eds.), Laser Handbook, North-Holland Publ. Co., Amsterdam, 1972.
[2]P.R. Hemmer, Rare-earth-based quantum memories, Adv. Opt. Data Storage 4988 (2003) 40.
[3]K. Hamraoui, M. Ferhi, K. Horchani-Naifer, M. Ferid, Cool white light emission from LaPO4@LaPO4:Dy3+(5%) nanocomposite for white LEDs, J. Elec Mater. 50 (2021) 2206–2215.