Dencs, J., Z. Marton, B. Dencs, and G. Marton. 2003. “Chemical Utilization of Biomass II: Preparation of Adsorbents from Wheat Straw to Eliminate Cupric and Zinc Ions of Industrial Wastewaters”. Hungarian Journal of Industry and Chemistry 31 (1). https://hjic.mk.uni-pannon.hu/index.php/hjic/article/view/50.