RAJCHEL, Dariusz; RAJCHEL, Anna. Kamionka Piast Pit in Opole as an Example of Developing and Upgrading Green Areas. Rozwój Regionalny i Polityka Regionalna, [S. l.], n. 59, p. 53–70, 2022. DOI: 10.14746/rrpr.2022.59.05. Disponível em: https://pressto.amu.edu.pl/index.php/rrpr/article/view/36005. Acesso em: 11 oct. 2026.