Hajduk, Pawel. “DIVERGENCE BETWEEN AUTHORITIES ON PUBLICLY AVAILABLE SPATIAL DATA IN POLAND”. GIS Odyssey Journal 2, no. 2 (December 29, 2022): 115–127. Accessed April 28, 2024. https://www.gisjournal.us.edu.pl/index.php/gis-odyssey-journal/article/view/77.