KRUCZEK, Zygmunt. "Folia Turistica". Turyzm/Tourism, Poland, v. 18, n. 1, p. 102–105, 2008. DOI: 10.18778/0867-5856.18.1.20. Disponível em: https://www.czasopisma.uni.lodz.pl/tourism/article/view/10169. Acesso em: 8 aug. 2026.