1. (1) Barclay, M.A., Gongaware, E.F., Dalton, K. and Skrzypkowski, M.P., Thermodynamic cycle selection for distributed natural gas liquefaction, Advances in Cryogenic Engineering, Vol.49(2004), pp.75-82.
2. (2) Gongaware, D.F., Barclay, M.A., Barclay, J.A. and Skrzypkowski, M.P., Conversion of a waste gas to liquid natural gas, Advances in Cryogenic Engineering, Vol.49(2004), pp. 83-90.
3. (3) Fan, Q.H., Li, H.Y., Yin, Q.S. and Jia, L.X., Design and analysis of small-scale biogas liquefaction cycle, Advances in Cryogenic Engineering, Vol.53(2008), pp.1166-1174.
4. (4) Chang, H.M., Chung, M.J., Kim, M.J. and Park, S.B., Thermodynamic design of methane liquefaction system based on reversed-Brayton cycle, Cryogenics, Vol.49(2009), pp. 226-234.
5. (5) Flynn, T.M., Cryogenic Engineering, (2008), 2nd ed., CRC Press.