Malchik, Fedor, K. Tishenko, Svetlana Kalugina, and Andrey Kurbatov. “Potentiometric Determination of Peroxodisulfuric Acid During Electrolysis Sulfuric Acid”. Chemical Bulletin of Kazakh National University 72, no. 4 (September 14, 2013): 70-78. Accessed April 3, 2025. https://chemistry.kz/bulletin/index.php/kaznu/article/view/44.