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Daniel MD, Kirchhoff F, Czajak SC, Sehgal PK, Desrosiers RC (December 1992). "Protective effects of a live attenuated SIV vaccine with a deletion in the nef gene". Science. 258 (5090): 1938–41. Bibcode:1992Sci...258.1938D. doi:10.1126/science.1470917. PMID1470917.
Daniel MD, Kirchhoff F, Czajak SC, Sehgal PK, Desrosiers RC (December 1992). "Protective effects of a live attenuated SIV vaccine with a deletion in the nef gene". Science. 258 (5090): 1938–41. Bibcode:1992Sci...258.1938D. doi:10.1126/science.1470917. PMID1470917.
Daniel MD, Kirchhoff F, Czajak SC, Sehgal PK, Desrosiers RC (December 1992). "Protective effects of a live attenuated SIV vaccine with a deletion in the nef gene". Science. 258 (5090): 1938–41. Bibcode:1992Sci...258.1938D. doi:10.1126/science.1470917. PMID1470917.