1. Snelling, Walter O. Apparatus for Separating Gases. US Patent 1,174,631, 7 March 1916.
2. Paglieri, S. N, Way, J. D. Innovations in palladium membrane research. Separation and Purification Methods 2002;31(1):1–169, and references therein.
3. Paglieri, S. N. Palladium membranes. In: Sammells, A. F, Mundschau, M. V, editors. Nonporous inorganic membranes. Weinheim, Germany: Wiley-VCH; 2006. pp. 77–105, and references therein.
4. Makrides, Alkis C, Wright, Maurice A, Jewett, David N. Separation of Hydrogen by Permeation. US Patent 3,350,846, 7 Nov 1967.
5. Buxbaum, Robert E, Kinney, Andrew B. Hydrogen transport through tubular membranes of palladium-coated tantalum and niobium. Ind Eng Chem Res. 1996;35:530–7.