Huong, Duong, 		Vu, Le, 		Long, Nguyen, AND 		Thanh, Duong.
" Structural and Optical Properties of Samarium Doped Calcium Fluoride Nanoparticles Synthesized  By Co-Precipitation Technique" <em>VNU Journal of Science: Mathematics - Physics</em> [Online], Volume 32 Number 1 (15 March 2016)