1. Collins, I.R., US Patent 7008466, 2006.
2. Sloan, E.D., Clathrate Hydrates of Natural Gases, New York: Marcel Dekker, 1998.
3. Costello, C.A., Berluche, C.A., Oelfke, R.H., and Talley, L.D, US Patent 5936040, 1999.
4. Englezos, P., Clathrate hydrates, Ind. Eng. Chem. Res., 1993, vol. 32, no. 7, p. 1251.
5. Ripmeester, J.A., Hydrate research-from correlations to a knowledge-based discipline: The importance of structure, Ann. N. Y. Acad. Sci., 2000, vol. 912, no. 1, p.1.