DU PLESSIS, Mathys C.; DE KOCK, Gideon de V. Incorporating structured text retrieval into the extended Boolean model. COMPUTING AND INFORMATICS, [S. l.], v. 28, n. 5, p. 581–597, 2012. Disponível em: https://www.cai.sk/ojs/index.php/cai/article/view/50. Acesso em: 25 apr. 2024.