1. Agglutinability of some selected streptococci by immune complexes;Christensen;Acta path. microbiol. scand. Sect. C,1975
2. Purification of immunoglobulin G Fc-reactive factor from Streptococcus azgazardah.;Christensen;Acta path. microbiol. scand. Sect. C
3. New method for the serological grouping of streptococci with specific antibodies adsorbed to protein A-containing staphylococci;Christensen;Inf. Immun.,1973
4. Capacity of some group A, B, C, D and G streptococci to agglutinate sensitized sheep red cells;Christensen;Acta path. microbiol. scand. Sect. B,1974
5. Quantitation of the uptake of human IgG by some streptococci groups A, B, C and G;Christensen;Acta path. microbiol. scand. Sect. B,1974