TAVAKOLI-HOSEINI, N.; DAVOODNIA, A. Silica Gel-Supported Polyphosphoric Acid: A Mild, Efficient and Reusable Catalyst for the One-Pot Synthesis of 1,2,4,5-Tetrasubstituted Imidazoles. Asian Journal of Chemistry, [S. l.], v. 22, n. 9, p. 7197–7200, 2010. Disponível em: https://asianpubs.org/index.php/ajchem/article/view/11968. Acesso em: 25 nov. 2024.