KATRITZKY, A.R. The Prototropic Tautomerism of Heteroaromatic Compounds. CHIMIA, [S. l.], v. 24, n. 4, p. 134, 1970. DOI: 10.2533/chimia.1970.134. Disponível em: https://www.chimia.ch/chimia/article/view/1970_134. Acesso em: 6 apr. 2025.