1. Gas Separation by Adsorption Processes
2. Skarstrom, C. W. Method and apparatus for fractionating gaseous mixtures by adsorption. U.S. Patent 2,944,627, 1960.
3. Guérin De Montgareuil, P.; Domine, D. Process for separating a binary gaseous mixture by adsorption. U.S. Patent 3,155,468, 1964.
4. Air separation by pressure swing adsorption