Trùng Dương, N., and M. S. Nguyễn. “PHOTOLUMINESCENCE MECHANISM OF THE RARE EARTH IONS Eu3+ and Sm3+ DOPED INSIDE TiO2 NANOPARTICLES”. Hue University Journal of Science: Natural Science, vol. 128, no. 1A, Mar. 2019, pp. 27-38, doi:10.26459/hueuni-jns.v128i1A.5146.