KRAJEWSKI, Stefan. Innovation Levels in the Economies of Central and Eastern Europe. Comparative Economic Research. Central and Eastern Europe, [S. l.], v. 17, n. 3, p. 101–122, 2014. DOI: 10.2478/cer-2014-0025. Disponível em: https://czasopisma.uni.lodz.pl/CER/article/view/7028. Acesso em: 7 dec. 2025.