He, Dongliang, Xiaowei Huang, Shanshan Zhao, and Donghua Hu. “Synthesis and Catalytic Performance of Yb3+, Er3+ Doped Titanium Dioxide”. Asian Journal of Chemistry 27, no. 4 (February 4, 2015): 1477–1480. Accessed November 23, 2024. https://asianpubs.org/index.php/ajchem/article/view/27_4_67.