T. Kalak, J. Dudczak, E. Szychowiak, and R. Cierpiszewski, “Biosorption of Cu II and Cd II Heavy Metals from Aqueous Solutions by Paprika Waste”, SOEP, vol. 5, no. 7, pp. 104–121, Jul. 2017, doi: 10.18559/SOEP.2017.7.8.