COTTRELL, S. P.; RAADIK, J. Socio-cultural benefits of PAN parks at Bieszscady National Park, Poland. Matkailututkimus, [S. l.], v. 4, n. 1, p. 56–67, 2008. Disponível em: https://journal.fi/matkailututkimus/article/view/90827. Acesso em: 22 heinä. 2024.