BERDE, Ágnes Barbara. Regional innovation: State of the art in the Észak-alföld region. Acta Agraria Debreceniensis, [S. l.], n. 44, p. 139–143, 2011. DOI: 10.34101/actaagrar/44/2623. Disponível em: https://ojs.lib.unideb.hu/actaagrar/article/view/2623.. Acesso em: 4 may. 2024.