SZTAUDYNGER, J. Jacek. Non-linear Impact of Investments on Economic Growth. Comparative Economic Research. Central and Eastern Europe, Poland, v. 7, n. 1-2, p. 172–184, 2004. DOI: 10.18778/1508-2008.7.09. Disponível em: https://czasopisma.uni.lodz.pl/CER/article/view/30074. Acesso em: 23 aug. 2026.