Pacak, J. (1998) „What Does It Mean Chemistry Didactics and to Where It Should Be Categorized?", Chemické listy, 92(5). Dostupné z: http://ww.chemicke-listy.cz/ojs3/index.php/chemicke-listy/article/view/2699 (Viděno: 28 prosinec 2024).