1. Koen, B. V. Discussion of the Method: Conducting the Engineer's Approach to Problem Solving (Oxford Univ. Press, Oxford, 2003).
2. Sloan, E. D. in Clathrate Hydrates of Natural Gases (Marcel Dekker, New York, 1998).
3. Ripmeester, J. A. Hydrate research – from correlations to a knowledge-based discipline: the importance of structure. Ann. NY Acad Sci. 912, 1–16 (2000).
4. Sloan, E. D. in Hydrate Engineering (Soc. Petrol. Eng., Richardson, TX, 2000).
5. Makogon, Y. F. Hydrates of Hydrocarbons (Pennwell Books, Tulsa, 1997).