1. A new composite sorbent for methane – nitrogen separation by adsorption;Baksh;Sep Sci Technol,1990
2. Bałys, M., Buczek, B. and Ziętkiewicz, J., 1994, Modelling study of PSA process for methane recovery from mine gas, Presented at the Silesian International Conference on Coalbed Methane Utilisation, Katowice.
3. Buras, R.J. and Mitariten, M.J., 1994, Nitrogen rejection with pressure swing adsorption. Principles design and remote control using expert system, in Proc. 44th Laurence Reid Gas Conditioning Conference, pp 93–103.
4. D’Amico, J., Reinhold, H. and Gamez, J., 1993, A PSA process for nitrogen rejection from natural gas. Presented at 1993 Laurence Reid Gas Conditioning Conference, Norman, OK.
5. Davies, M.M. and Gray, R.L., 1992, Process for the purification of natural gas, United States Patent no. 5,174,796.