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2. S. N. Vinogradov andR. H. Linnell, “Hydrogen Bonding”, Van Nostrand Reinhold Co., New York, 1971.
3. P. Schuster, G. Zundel andC. Sandorfy, eds. “The Hydrogen Bond”, North-Holland Publishing Co., Amsterdam, 1976.
4. A. N. Fletcher andC. A. Heller, J. Phys. Chem.71 3742 (1967); ibid. J. Phys. Chem.72, 1839 (1968).
5. A. Kivinen, J. Murto, J. Korppi-Tommola andR. Kuopio, Acta Chem. Scand.26, 904 (1972).