Hartman, M., Pohořelý, M. a Trnka, O. (2006) „Chemical and Fuel Characteristics of Anaerobically Stabilized Sewage Sludge and Its Ash", Chemické listy, 100(9). Dostupné z: http://ww.chemicke-listy.cz/ojs3/index.php/chemicke-listy/article/view/1888 (Viděno: 24 duben 2024).