Ćwiąkała-Małys, Anna, and Monika Mościbrodzka. “THE APPLICATION OF CZEKANOWKI’S DIAGRAM IN A PROCESS OF GROPUING OF PUBLIC UNIVERSITIES DUE TO THE LEVEL AND STRUCTURE OF COSTS”. Journal of European Economy, vol. 14, no. 3, Oct. 2017, pp. 303-31, https://jeej.wunu.edu.ua/index.php/enjee/article/view/841.