Sheilatina, S., J. Julinawati, S. F. Shara Fonna, and F. Fathurrahmi. “Utilization of Tannin Extract from Spent Coffee Ground (SCG) As a Green Corrosion Inhibitor on Ferrous Metals in Acidic and Alkaline Media”. Journal of Pharmaceutical and Sciences, vol. 6, no. 5-si, Dec. 2023, pp. 168-76, doi:10.36490/journal-jps.com.v6i5-si.403.