KWIECIEŃ, Kamil. Research and development in Polish enterprises against the background of the European Union. Ekonomia Międzynarodowa (International Economics), [S. l.], n. 24, p. 133–147, 2018. DOI: 10.18778/2082-4440.24.02. Disponível em: https://czasopisma.uni.lodz.pl/em/article/view/4490. Acesso em: 22 jul. 2024.