Olejniczak, Grzegorz, and Józef Hernik. “Spatial Planning System in Germany in Terms of Regional Development”. Acta Scientiarum Polonorum Administratio Locorum 12, no. 2 (May 29, 2019). Accessed July 22, 2024. https://czasopisma.uwm.edu.pl/index.php/aspal/article/view/4237.