References - Willems, A., Collins, M.D. (1995) Phylogenetic analysis of Ruminococcus flavefaciens, the type species of the genus Ruminococcus, does not support the reclassification of Streptococcus hansenii and Peptostreptococcus productus as ruminococci. Int. J. syst. Bact. 45, 572-575. - Nakatani, S., Hoshi, K., Yuasa, T., Sato, T., Tauchi, T. (1998). [A case report of epidural abscess due to anaerobic bacteria, producing a mass of gas].[In Japanese] Rinsho Shinkeigaku. 38, 224-227. - Botha, S.J., Senekal, R., Steyn, P.L., Coetzee, W.J. (1993). Anaerobic bacteria in orofacial abscesses. J. dent. Assoc. S. Afr. 48, 445-449.