“Separation of Fumaric and Maleic Acid Crystals from the Industrial Wastewater of Maleic Anhydride Production”. Hungarian Journal of Industry and Chemistry 50, no. 2 (November 28, 2022): 1–6. Accessed April 18, 2025. https://hjic.mk.uni-pannon.hu/index.php/hjic/article/view/1165.