MAJUMDAR, K.; SINGH, U. N. A Formal Model of Ods Schema in LIPS. Journal of Information and Knowledge, [S. l.], v. 45, n. 2, p. 155–168, 2008. DOI: 10.17821/srels/2008/v45i2/44191. Disponível em: https://srels.org/index.php/sjim/article/view/44191. Acesso em: 19 apr. 2025.