Kalak, Tomasz, Joanna Dudczak, Elwira Szychowiak, and Ryszard Cierpiszewski. 2017. “Biosorption of Cu II and Cd II Heavy Metals from Aqueous Solutions by Paprika Waste”. Studia Oeconomica Posnaniensia 5 (7): 104-21. https://doi.org/10.18559/SOEP.2017.7.8.