Fassi, R. N., and C. Boukhalfa. “Direct Analysis of Hexavalent Chromium in Water Samples by UV-Vis Spectrophotometry: Effects of PH and the Presence of Foreign Ions”. Analytical Methods in Environmental Chemistry Journal, Vol. 7, no. 02, June 2024, pp. 18-28, doi:10.24200/amecj.v7.i02.278.