Rani Padhy, Rashmi, and Sangeeta Tiwari. “Antibacterial Action and Efficacy of Silver and Copper Exchanged Na-Y Zeolite from Fly Ash on 304 Stainless Steel Coupons by Agar Diffusion Method”. Asian Journal of Chemistry, vol. 33, no. 2, Jan. 2021, pp. 371-5, doi:10.14233/ajchem.2021.23002.