Vasenkov, Sergey, and Pavel Kortunov. “PFG NMR Measurements of Tortuosity Factors for Diffusion in Meso- and Macropores of FCC Catalysts”. Diffusion Fundamentals 1 (April 1, 2005). Accessed April 10, 2025. https://diffusion.journals.qucosa.de/diffusion/article/view/182.