1. Part 1. I. D.Cunningham, J. S.Blanden, J.Llor, L.Muñoz and A. P.Sharratt, J. Chem. Soc., Perkin Trans. 2, preceding paper.
2. The Chemistry of Amidines and Imidates, ed. S. Patai, Wiley, New York, 1975;
3. The Chemistry of Carbon-Nitrogen Double Bond, ed. S. Patai, Wiley, New York, 1970.
4. L. M. Jackman and F. A.Cotton, Dynamic NMR Spectroscopy, Academic Press, New York, 1975, ch. 7;
5. Detection of Hindered Rotation and Inversion by NMR Spectroscopy