KUMAR SHARMA, SUSHIL, et al. “Electrochemical Reduction of P-Nitro Benzoic Acid at Glassy Carbon and Stainless Steel (SS-316) Electrode at Different PH”. Asian Journal of Chemistry, vol. 21, no. 5, Mar. 2010, pp. 3976-80, https://asianpubs.org/index.php/ajchem/article/view/17377.