Tavakoli-Hoseini, N. and Davoodnia, A. (2010) “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, 22(9), pp. 7197–7200. Available at: https://asianpubs.org/index.php/ajchem/article/view/11968 (Accessed: 25 November 2024).