1. Tetrazolium reduction as a means of differentiating Streptococcus faecalis from Streptococcus facium;Barnes;J. gen. Microbiol.,1956
2. The use of blood agar for the study of streptococci;Brown;Monograph of the Rockefeller Institute for Medical Research No. 9,1919
3. Zooglea-forming streptococci, resembling Streptococcus sanguin, isolated from dental plaque in man;Carlsson;Odont. Revy,1965
4. Presence of various types of non-haemolytic streptococci in dental plaque and in other sites of the oral cavity of man;Carlsson;Odont. Revy,1967
5. The isolation of streptococci from mixed cultures;Chapman;J. Bact.,1944