1. A serological differentiation of human and other groups of haemolytic streptococci;Lancefield, R.C.;J Exp Med,1933
2. The formamide method for the extraction of polysaccharides from haemolytic streptococci;Fuller, A.T.;Br J Exp Pathol,1938
3. Preparation of streptococcal extracts for Lancefield grouping;Maxted, W.R.;Lancet,1948
4. Use of autoclaved extracts of haemolytic streptococci for serological grouping;Rantz, L.A.; Randall, E.;Stanford Med BuUl,1955
5. New method for the serological grouping of streptococci with specific antibodies adsorbed to protein A-containing staphylococci;Christensen, P.; Kahlmeter, G.; Jonsson, S.; Kronvall, G.;Infect Immun,1973