VIEHE, H.G.; DE VOGHEL, G.J.; SMETS, F. Pyridines and Quinolines from 1,3-Dichloro-Trimethinecyanines Pyrimidine and Quinazoline from Azacyanine. CHIMIA, [S. l.], v. 30, n. 3, p. 189, 1976. DOI: 10.2533/chimia.1976.189. Disponível em: https://www.chimia.ch/chimia/article/view/1976_189. Acesso em: 6 apr. 2025.