1. Coronaviruses of man;Bradburne;Progr. med. Virol.,1971
2. Techniques for haemagglutination and haemagglutination inhibition with arthropodborne viruses;Clarke;Amer. J. Trop. Med. Hyg.,1958
3. Hinton , R. H. Mullock , B. M. Reid , E. Gilhuus-Moe , C. C. The use of Metrizamide as a density gradient medium. Abstracts, 9th Int. Congress of Biochemistry, Stockholm 1973
4. A simple method for concentration of arboviruses propagated in tissue culture;Horzinek;Amer. J. Trop. Med. Hyg.,1969
5. Analysis of Sindbis virus and its soluble antigens in preparations concentrated by precipitation with polyethylene glycol or ammonium sulfate;Inglot;Acta virol.,1973