SATIJA, M. P. Classification: A Universal Constant. Journal of Information and Knowledge, [S. l.], v. 49, n. 3, p. 225–237, 2012. DOI: 10.17821/srels/2012/v49i3/43993. Disponível em: https://www.srels.org/index.php/sjim/article/view/43993. Acesso em: 19 sep. 2025.