Long NV, Xuan Thao DT, Chien ND, Binh PT. Structure and physico-chemical properties of silica gels doped with optically activated Er3+ ions by sol-gel process. VJChem [Internet]. 2014 Sep. 1 [cited 2024 May 4];45(1):114. Available from: https://vjs.ac.vn/index.php/vjchem/article/view/4721