Santhi, S. “Oxidative Deoximation of N-Methyl-2,6-Diphenyl Piperidin-4-One Oxime and Its 3-Alkyl Derivatives by Acid Dichromate”. Asian Journal of Chemistry, vol. 24, no. 6, Feb. 2012, pp. 2529-32, https://asianpubs.org/index.php/ajchem/article/view/9169.