1. Serum facor in rheumatoid arthritis agglutinating sensitised sheep red cells;Ball;Lancet,1950
2. Sheep cell agglutination test for rheumatoid arthritis. A clinico-pathological study;Ball;Annal Rheumat. Dis.,1952
3. Evaluation of haemagglutination tests in the diagnosis of rheumatoid arthritis;Bartfeld;Annal Rheumat. Dis.,1958
4. Discussion to haemagglutination test for rheumatoid arthritis;Bayles;Annal. Rheumat. Dis.,1953
5. Clinical isgnificance of agglutination techniques in rheumatoid arthritis;Berkowitz;Arch. Interameric. Reumat.,1958