1. Ahmet, C., Semra, I., Cansu, F., & Figen, C. (2005). Pb+2 biosorption by pretreated fungal biomass. Turkish Journal of Biology, 29, 23–28.
2. Akhtar, M. N., Sivarama, K. S., & Maruthi, P. M. (1996). Mechanism of metal ion biosorption by fungal biomass. Biometal, 9(1), 21–28.
3. Aksu, Z. (2001). Equilibrium and kinetic modelling of cadmium(II) biosorption by C. vulgaris in a batch system: Effect of temperature. Separation and Purification Technology, 21, 285–294.
4. Aksu, Z., & Kutsal, T. A. (1991). A bioseparation process for removing Pb(II) ions from wastewater by using C. vulgaris. Journal of Chemical Technology and Biotechnology, 52(1), 108–118.
5. Bai, S. R., & Abraham, T. E. (2001). Biosorption of Cr(VI) from aqueous solution by Rhizopus nigricans. Bioresource Technology, 79, 73–104.