Stafilov, Trajče. “Modification of the Method for Spectrophotometric Determination of Chromium in Waste Waters by Diphenylcarbazide”. Macedonian Journal of Ecology and Environment 2, no. 2 (December 31, 1994): 59–68. Accessed January 31, 2026. https://mjee.org.mk/index.php/mjee/article/view/28.