1. Allen, F.H., Kennard, O., Watson, D.G., Brammer, L., Orpen, A.G. and Taylor, R. (1987). Tables of bond lengths determined by X-ray and neutron diffraction. Part 1. Bond lengths in organic compounds. J. Chem. Soc., Perkin Trans.
2, S1–S19.
2. Orpen, A.G., Brammer, L., Allen, F.H., Kennard, O., Watson, D.G. and Taylor, R. (1989). Tables of bond lengths determined by X-ray and neutron diffraction. Part II. Organometallic compounds and coordination complexes of the d- and f-block metals. J.Chem.Soc. Dalton Trans., pp S1–S83.
3. Allen, F.H., Bergerhoff, G. and Sievers, R. (1987). Crystallographic Databases. International Union of Crystallography, Chester, UK.
4. Allen, F.H., Davies, J.E., Galloy, J.J., Johnson, O., Kennard, O., Macrae, C.F., Mitchell, E.M., Mitchell, G.F., Smith, J.M., and Watson, D.G. (1991) The Development of Versions 3 and 4 of the Cambridge Structural Database System, J. Chem.Inf. Comput. Sci., 31, 187–204.
5. Sayle, R. (1995). RASMOL- A Program for Structure Visualisation. University of Edinburgh and Glaxo Group Research, Stevenage, UK.