GEDAM, P. B. UDC Online: A Study. Journal of Information and Knowledge, [S. l.], v. 52, n. 5, p. 327–335, 2015. DOI: 10.17821/srels/2015/v52i5/79735. Disponível em: https://srels.org/index.php/sjim/article/view/79735. Acesso em: 22 nov. 2025.