1. https://www.airgas.com/resources/gases101/oxygen
2. A. Thekdi , M.Atkinson , J.Barry , D.Boone , M.Ciampini , J.Greene , A.Marker , B.Pasley , P. L.Roberts , S.Sikirica , A.Wright , C.Weinhold and J.Cole , By Lawrence Berkeley National Laboratory, Berkeley, California Resource Dynamics Corporation, Vienna, Virginia, In cooperation with the Industrial Heating Equipment Association, Cincinnati, Ohio , Produced by the National Renewable Energy Laboratory , Golden, Colorado , 2nd edn, 2007
3. Technical and economic aspects of oxygen separation for oxy-fuel purposes
4. Oak Ridge National Laboratory , Materials for Separation Technologies: Energy and Emission Reduction Opportunities , 2005
5. B. Sabine , C.Kramer , and A.Fisher , Bandwidth Study on Energy Use and Potential Energy Saving Opportunities in US Chemical Manufacturing , No. DOE/EE-1229, Energetics , 2015