V. N. K. Putta, M. Adicherla, S. Bandi, G. V. . Koneru, and P. Kanuparti, “Solid State Synthesis and Characterization of Yb3+/Ho3+ Doped GdPO4 Nanophosphor for Luminescence Properties”, ajc, vol. 35, no. 10, pp. 2349–2352, Sep. 2023.