WĘGRZYN, Joanna. Research trends of public-private partnerships (PPPs) in Poland. Oeconomia Copernicana, [S. l.], v. 6, n. 1, p. 125–136, 2015. DOI: 10.12775/OeC.2015.007. Disponível em: https://journals.economic-research.pl/oc/article/view/185. Acesso em: 20 jun. 2024.