Knowledge Based Expert System for Diagnosis of COVID-19 . Journal of Pharmaceutical Negative Results, [S. l.], p. 1242–1249, 2023. DOI: 10.47750/pnr.2023.14.03.165. Disponível em: https://mail.pnrjournal.com/index.php/home/article/view/8282.. Acesso em: 13 jun. 2026.