Shen, Z., M. Gu, L. Yang, S. Liu, W. Zhang, and W. Dong. “Solvent Isotope Effect on Hydrogen-Transfer Reduction of CO2 into Formate With Glycerine by Alkaline Hydrothermal Reaction”. Journal of Technology Innovations in Renewable Energy, vol. 4, no. 1, Mar. 2015, pp. 21-24, doi:10.6000/1929-6002.2015.04.01.3.