Bibliography
José Elguero, Claude Marzin, Alan R. Katritzky and Paolo Linda, “The Tautomerism of Heterocycles”, Supplement 1, Advances in Heterocyclic Chemistry, Academic Press, 1976.
Peter Taylor, “Tautomeric Preference: Survey and Guidelines”, Unpublished, 1999.
Peter Kenny, “Handling Heterocyclic Tautomerism”, Daylight MUG Presentation, Santa Fe, 1999.