Parysek, Jerzy J., and Lidia Mierzejewska. “From the City As a System to the System of Cities: The Systemic Approach to Urban Planning”. Quaestiones Geographicae 45, no. 2 (June 29, 2026): 83–100. Accessed July 16, 2026. https://pressto.amu.edu.pl/index.php/qg/article/view/55228.