MADHAVAN, P.; MANJREKAR, T.G.; UNNI, M.K. Steric Effects in Light Absorption of Violanthrone Derivatives. CHIMIA, [S. l.], v. 20, n. 9, p. 300, 1966. DOI: 10.2533/chimia.1966.300. Disponível em: https://www.chimia.ch/chimia/article/view/1966_300. Acesso em: 6 apr. 2025.