Opršal, Z., Harmáček, J., Pavlík, P., & Machar, I. (2018). What Factors can Influence the Expansion of Protected Areas around the World in the Context of International Environmental and Development Goals?. Problemy Ekorozwoju, 13(1), 145–157. Retrieved from https://ph.pollub.pl/index.php/preko/article/view/5047