NOVOTNÝ, J. .; POLÁCH, J. . Real Silver And Its Investment And Business Options. International Journal of Entrepreneurial Knowledge, [S. l.], v. 4, n. 1, 2016. DOI: 10.37335/ijek.v4i1.36. Disponível em: https://ijek.org/index.php/IJEK/article/view/36. Acesso em: 23 may. 2024.