Hue, Hoang Thi Huong, et al. “Characterization of CaO-CuO-CeO2 Mixed Oxide Synthesized by the Impregnation and Investigation of Its Reusability”. <i>Vietnam Journal of Science and Technology</i>, vol. 55, no. 4, Aug. 2017, pp. 429-36, doi:10.15625/2525-2518/55/4/8952.