Qin, X.-Y. (2010) “Silica Sulfuric Acid: An Efficient and Versatile Catalyst for One-Pot Synthesis of Substituted 5-Oxo-1,4,5,6,7,8-hexahydroquinoline Derivatives”, Asian Journal of Chemistry, 22(2), pp. 1179–1182. Available at: https://asianpubs.org/index.php/ajchem/article/view/11247 (Accessed: 25 November 2024).