1. Pimentel and McClellan, The Hydrogen Bond, Freeman, San Francisco, 1960.
2. Pimentel and McClellan Ann. Reviews Phys. Chem., 1971, 22, 347.
3. Joesten and Drago, Hydrogen Bonding, Dekker, New York, 1974.
4. Hydrogen Bonding, ed. Hadzi and Thompson, Pergamon Press, 1959.
5. Bellamy, Osborne and Pace, J. Chem. Soc., 1963, 3749.