1. Immunofluorescence detection of a new antigen-antibody system (δ/anti-δ) associated to the hepatitis B virus in the liver and in the serum of HBsAg carriers;Rizzetto;Gut,1977
2. M. Rizzetto, Mg Canese, Jl Gerin, Wt London, Ld Sly, RH. Purcell, Transmission of the hepatitis B virus-associated δ antigen to chimpanzees, J Infect Dis ((in press)).
3. M. Rizzetto, Rh Purcell, JL. Gerin, Delta antigen: evidence for a variant of hepatitis B virus or a defective non-A, non-B agent In: M. Pollard (Eds), Perspectives in virology., Raven Press, New York ((in press)).
4. Incidence and significance of antibodies to delta antigen in hepatitis B virus infection;Rizzetto;Lancet,1979
5. Epidemiology;Krugman,1978