Lev D. Gelb Gelb, L. D., & Gubbins, K. E. (1998). Characterization of Porous Glasses:  Simulation Models, Adsorption Isotherms, and the Brunauer−Emmett−Teller Analysis Method. Langmuir, 14(8), 2097–2111. https://doi.org/10.1021/la9710379