1. Study on the Actinomyces isolated from the deeper layer of carious dentine;Onishi, M.;Shikagaku Zasshi,1949
2. Proteolytic organisms of the carious lesion;Roth, G.D.;Oral Surg,1957
3. Broeren, Peel cete. J Gen Microbiol 1960;23: 163-78.
4. an aerobic genus of the family Actinomycetaceae;Int J Syst Bacteriol,1967
5. manual of determinative bacteriology;In, Georg L.K.Rothia,1974