2Yoshida M,et al. correlation between clinical symptoms and microorganisms isolate from root canals of teeth with periapical pathosis. J-Endod,1987;Jan;13(1):24
3Mrrchell D. A. Metronidazole: Its use in clinical dentistry. J Clin-periodontology,1984;11:145
4Johnston B L. Bacteriologic and clinical study of Bacteroides oris and Bacteroides buccae. J-Clin Microbiol, 1987;Mar;25(3):491