Duy Thien, N., 		Tu, N., 		Hoa, N., 		Doanh, S., & 		Vu, L.
2021 Mar 12.  Fabrication, Characterization of SiO2 Nanospheres  and SiO2 Opal Photonic Crystals. VNU Journal of Science: Mathematics - Physics. [Online] 37:1