1. D. Simbeck, E. Chang, Hydrogen Supply: Cost Estimate for Hydrogen Pathways – Scoping Analysis, Subcontractor Report, Mountain View, California, 2002, http://www.nrel.gov/docs/fy03osti/32525.pdf (online address).
2. Hydrogen biotechnology: progress and prospects;Benemann;Nat. Biotechnol.,1996
3. Hydrogen production by biological processes: a survey of literature;Das;Int. J. Hydrogen Energy,2001
4. A parametric study of layered bed PSA for hydrogen purification;Ribeiro;Chem. Eng. Sci.,2008
5. Gas Separation by Adsorption Processes;Yang,1997