Pu, Y.; Tang, K.; Zhu, D.-C.; Han, T.; Zhao, C.; Peng, L.-L. Synthesis and Luminescence Properties of (Y, Gd) (P, V)O4:Eu3+, Bi3+Red Nano-Phosphors With Enhanced Photoluminescence by Bi3+, Gd3+ Doping. Nano-Micro Lett 2013, 5, 117-123.