Foltin, M., Prochackova, T., & Kandrac, J. (1999). Spectrophotometric Determination of Chromium in Samples with High Contents of Humic Substances. Chemické Listy, 93(6). Získáno z http://www-.chemicke-listy.cz/ojs3/index.php/chemicke-listy/article/view/2607