1. J. Packer and J.Vaughan, A Modern Approach to Organic Chemistry, OUP, London, 1958, ch. v, p. 102.
2. A. J. Downs and C. J.Adams, in Comprehensive Inorganic Chemistry, ed. A. F. Trotman-Dickenson, Pergamon, New York, 1971, vol. 2, ch. 26, p. 1219.
3. R. S. Mulliken and W. B.Person, Molecular Complexes, Wiley, New York, 1969, ch. 4, p. 41.
4. Tilden Lecture. The properties of hydrogen-bonded dimers from rotational spectroscopy
5. Rotational spectrum of (CH3)3P⋯HCl and a comparison of properties within the series of axially symmetric dimers R3Y⋯HCl, where Y = N or P and R = H or CH3