Šafářová, M. a 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). Dostupné z: http://blog.chemicke-listy.cz/ojs3/index.php/chemicke-listy/article/view/1924 (Viděno: 29 listopad 2024).