Aouissi, A., L.A. Allaoui, and D. Aldhayan. 2010. “Catalytic Reactivity of 12-Molybdophosphoric Acid and Its Copper and Zinc Salts in CO2 Methanol Reforming”. Asian Journal of Chemistry 18 (4):3009-16. https://asianpubs.org/index.php/ajchem/article/view/20723.