1. G. A. Jeffrey, Hydrogen Bonding in Biological Systems (Oxford, New York, 1997), p. 15.
2. S. Scheiner, Hydrogen Bonding: A Theoretical Perspective (Oxford, New York, 1997), p. 11.
3. M. Cavalleri, Ph.D. thesis, Stockholm University, 2004.
4. Cooperativity and hydrogen bonding network in water clusters