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2. G. C. Pimentel, A. L. McClellan, The Hydrogen Bond, W. H. Freeman, San Francisco, CA, 1960.
3. The Hydrogen Bond: Recent Developments in Theory and Experiments, ed. by P. Schuster, G. Zundel, C. Sandorfy, North-Holland Publishing Company, Amsterdam, 1976.
4. G. A. Jeffrey, An Introduction to Hydrogen Bonding, Oxford University Press, New York, 1997.
5. S. Scheiner, Hydrogen Bonding: A Theoretical Perspective, Oxford University Press, Oxford, 1997.