Sponar, J. a Havlica, J. (2001) „The Possibility of Treatment of Sewage Sludge Before High-Temperature Processes", Chemické listy, 95(7). Dostupné z: http://www-.chemicke-listy.cz/ojs3/index.php/chemicke-listy/article/view/2407 (Viděno: 8 listopad 2024).