ZIMON, Grzegorz. Influence of group purchasing organizations on financial situation of Polish SMEs. Oeconomia Copernicana, [S. l.], v. 9, n. 1, p. 87–104, 2018. DOI: 10.24136/oc.2018.005. Disponível em: https://journals.economic-research.pl/oc/article/view/717. Acesso em: 25 jun. 2024.