1. On the virulence of group A streptococci. Evidence for virulence factors other than M-protein and capsule;Becker;Am. J. Pathol.,1973
2. Interrelations between the virulence and M-state of hemolytic streptococci, group A;Burova;Zh.Mikrobiol. Epidemiol. Immunol.,1979
3. Interaction between the Fc part of IgG with Lancefield extracts of hemolytic streptococci. Strain specificity and activity;Christensen;Acta path. microbiol. scand. Sect. C,1979
4. Demonstration of the non-identity between the Fc-receptor for human IgG from group A streptococci type 15 and M protein, peptidoglycan and the group specific carbohydrate;Christensen;Acta path. microbiol. scand. Sect. C,1979
5. Interaction of streptococci with the Fc fragment of IgG;Christensen;Acta path. microbiol. scand. Sect. C,1976