HIRAN, B.L., et al. “Kinetics and Mechanism of Oxidation of M- P-Nitrobenzaldehydes by Quinolinium Bromochromate in Acetic Acid-Perchloric Acid-Water Medium”. Asian Journal of Chemistry, vol. 19, no. 1, Mar. 2010, pp. 523-30, https://asianpubs.org/index.php/ajchem/article/view/20519.