Carvalho, Cibele Barreto Mano de, José Luciano Bezerra Moreira, and Maria Candida S. Ferreira. 1996. “ Epidemiology and Antimicrobial Resistance of B. Fragilis Group Organisms Isolated from Clinical Specimen and Human Intestinal Microbiota ”. Revista Do Instituto De Medicina Tropical De São Paulo 38 (5): 329-36. https://revistas.usp.br/rimtsp/article/view/29397.