SZAFRANEK, Edyta. Transformations of the economic structures in the Opole region in the years 1994-2002. Bulletin of Geography. Socio-economic Series, [S. l.], n. 3, p. 23–39, 2004. DOI: 10.1515/2505. Disponível em: https://apcz.umk.pl/BGSS/article/view/2505. Acesso em: 8 jul. 2025.