Thien, Nguyen Duy, et al. “Hydrothermal Synthesis and Optical Properties of Undoped and \(\text{Eu}^{3+}\)-Doped Zinc Stannate Nanocrystals”. Communications in Physics, vol. 25, no. 4, Jan. 2016, p. 327, doi:10.15625/0868-3166/25/4/7337.