Zaki, M. I., Knözinger, H., Tesche, B., Mekhemer, G. A. H., & Bongard, H.-J. (2008). Chemical and morphological consequences of acidification of pure, phosphated, and phosphonated CaO: Influence of CO₂ adsorption. Langmuir, 24, 6745-6753. doi:10.1021/la8000366.