Prospects of fish scale and fin samples usage for nonlethal monitoring of metal contamination: a study on five fish species from the Danube RiverKatarina Jovičić, Saša Janković, Dragica M. Nikolić, Vesna Đikanović, Stefan Skorić, Jasmina Krpo-Ćetković and Ivan JarićKnowl. Manag. Aquat. Ecosyst., 424 (2023) 4DOI: https://doi.org/10.1051/kmae/2022027