Fryčová, Marie, Petr Sysel, Pavel Hrabánek, Milan Kočiřík, Libor Brabec, Arlette Zikánová, Bohumil Bernauer, Pavel Čapek, and Vladimír Hejtmánek. “Helium Permeation through Mixed Matrix Membranes Based on Polyimides and Silicalite-1”. Diffusion Fundamentals 11 (December 31, 2009). Accessed April 10, 2025. https://diffusion.journals.qucosa.de/diffusion/article/view/458.