GONZÁLEZ-FERNÁNDEZ, M.; GONZÁLEZ-VELASCO, C.; FANJUL-SUÁREZ, J.-L. Corruption, the Shadow Economy and Innovation in Spanish Regions. Panoeconomicus, [S. l.], v. 67, n. 4, p. 509–537, 2018. DOI: 10.2298/PAN170605003G. Disponível em: http://www.panoeconomicus.org/index.php/jorunal/article/view/461. Acesso em: 8 feb. 2023.