PIĄTKOWSKI, M. J. Analysis of Investment Activities of Enterprises in Poland. Przedsiębiorczość - Edukacja, [S. l.], v. 16, n. 2, p. 225–238, 2020. DOI: 10.24917/20833296.162.18. Disponível em: https://p-e.uken.krakow.pl/article/view/7776. Acesso em: 5 maj. 2024.