WĘGRZYN, G. The Service Sector of a Knowledge-based Economy – a Comparative Study. Oeconomia Copernicana, [S. l.], v. 4, n. 1, p. 53–64, 2013. DOI: 10.12775/OeC.2013.004. Disponível em: https://apcz.umk.pl/OeC/article/view/OeC.2013.004. Acesso em: 27 apr. 2024.