1. R. J. Graut , in The Chemistry of Amidines and Imidates, ed. Patai, S., Wiley, Chichester, 1975, ch. 6, and references cited therein.
2. G. Häfelinger , and F. K. H.Kuske, in The Chemistry of Amidines and Imidates, ed. Patai, S., and Rappoport, Z., Wiley, Chichester, 1991, vol. 2, ch. 1.
3. Y. Yamamoto , and S.Kojima, in The Chemistry of Amidines and Imidates, ed. Patai, S., and Rapport, Z., Wiley, Chichester, 1991, vol. 2, ch. 10.
4. J. Oszczapowicz , in The Chemistry of Amidines and Imidates, ed., Patai, S., and Rappoport, Z., Wiley, Chichester, 1991, vol. 2, ch. 12.
5. Prediction of tautomeric equilibria for N-arylamidines