WYSOKIŃSKA, Zofia. US vs EU Environmental Policy. Differences in Character and Effectiveness. Implications for Foreign Trade of Environmental Goods. Comparative Economic Research. Central and Eastern Europe, Poland, v. 9, n. 1-2, p. 5–27, 2006. DOI: 10.18778/1508-2008.9.01. Disponível em: https://czasopisma.uni.lodz.pl/CER/article/view/30017. Acesso em: 23 aug. 2026.