NAWROCKI, Tomasz L. R&D activity and core business efficiency on the example of technology companies. Oeconomia Copernicana, [S. l.], v. 6, n. 4, p. 59–72, 2015. DOI: 10.12775/OeC.2015.029. Disponível em: https://journals.economic-research.pl/oc/article/view/155. Acesso em: 22 feb. 2024.