Bielak J, Kowerski M. Dynamics of Economic Development Measure. Fiftieth Anniversary of Publication of the Article by Prof. Zdzisław Hellwig. br [Internet]. 2019 Apr. 12 [cited 2025 Apr. 5];16(4):153-65. Available from: https://czaz.akademiazamojska.edu.pl/index.php/br/article/view/56