CYREK, M. Factors of Interregional Differences in a Share of Service Sector in Employment. Oeconomia Copernicana, [S. l.], v. 5, n. 1, p. 117–133, 2014. DOI: 10.12775/OeC.2014.007. Disponível em: http://economic-research.pl/Journals/index.php/oc/article/view/295. Acesso em: 5 dec. 2022.