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\bibitem{Rajfur_etal2010} Rajfur, M., K{\l}os, A., \& Wac{\l}awek, M. (2010). Sorption properties of algae Spirogyra sp. and their use for determination of heavy metal ions concentrations in surface water. \textit{Bioelectrochemistry}, \textit{80}(1), 81--86.

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