Pratap Singh, Sanjeev, and R.P. Singh. “Oximation of Carbonyl Compounds by Basic Alumina Supported Amberlite IRA 400 Under Microwave Energy and Pestle Mortar”. Asian Journal of Chemistry, vol. 24, no. 3, Dec. 2011, pp. 1354-6, https://asianpubs.org/index.php/ajchem/article/view/8780.