ROSZKO-WÓJTOWICZ, E.; GRZELAK, M. M.; LASKOWSKA, I. The impact of research and development activity on the TFP level in manufacturing in Poland. Equilibrium. Quarterly Journal of Economics and Economic Policy, [S. l.], v. 14, n. 4, p. 711–737, 2019. DOI: 10.24136/eq.2019.033. Disponível em: http://economic-research.pl/Journals/index.php/eq/article/view/1749. Acesso em: 22 mar. 2023.