Šafářová, M., & Řehoř, M. (2006). Trace Elements in Coal and Non-coal Sediments from the North Bohemian Brown Coal Basin and in Soils from Recultivated Localities. Chemické Listy, 100(6). Získáno z http://blog.chemicke-listy.cz/ojs3/index.php/chemicke-listy/article/view/1924