Ha, Hoang, Tran Thi Quynh Hoa, Le Van Vu, & Nguyen Ngoc Long. " Synthesis and Optical Properties of Ho3+, Pr3+ Co-doped LaF3 Nanocrystals." VNU Journal of Science: Mathematics - Physics [Online], 32.4 (2016): n. pag. Web. 29 Apr. 2024