Jha, C.S., Vijay Kumar Jha, Sushil Jha, and Prem Mohan Mishra. 2010. “Kinetics and Mechanism of Oxidation of Formaldehyde With Bi(V) in HClO4-HF Mixture ”. Asian Journal of Chemistry 10 (4):861-65. https://asianpubs.org/index.php/ajchem/article/view/23738.