1. A. J.
Kidnay
and W. R.Parrish, Fundamentals of Natural Gas Processing, CRC Press, Boca Raton, 2010
2. R. H.
Hugman
, E. H.Vidas and P. S.Springer, Chemical composition of discovered and undiscovered natural gas in the lower-48 United States. Project summary, Energy and Environ. Anal., Inc., 1990
3. Membrane separation of nitrogen from natural gas: A case study from membrane synthesis to commercial deployment