PERSKA, Anita. Innovation Input Dynamics of Polish Regions. Studia Oeconomica Posnaniensia, Poznan, Polska, v. 1, n. 12, p. s. 87–100, 2013. DOI: 10.18559/xaqpjq47. Disponível em: https://journals.ue.poznan.pl/soep/article/view/3518. Acesso em: 3 sep. 2026.