Stafilov, Trajče. “Corrections of the Methods for Manganese Determination in Waste Waters by UV-VIS Spectrophotometry and Atomic Absorption Spectrometry and Investigation of the Possibility for Its Precipitation”. Macedonian Journal of Ecology and Environment 2, no. 1 (August 31, 1994): 91–99. Accessed May 6, 2024. https://mjee.org.mk/index.php/mjee/article/view/19.