Kolar, L., Kuzel, S. a Gergel, J. (2002) „Perspectives of Czech Agriculture in Areas of Lower Productivity and Cooperation of Agriculture with Chemical Research and Industry", Chemické listy, 96(7). Dostupné z: http://blog.chemicke-listy.cz/ojs3/index.php/chemicke-listy/article/view/2313 (Viděno: 19 listopad 2024).