KŘÍŽ, R. Chaos in GDP. Acta Polytechnica, [S. l.], v. 51, n. 5, 2011. DOI: 10.14311/1442. Disponível em: https://ojst.is.cvut.cz/ojs/index.php/ap/article/view/1442.. Acesso em: 27 jun. 2025.