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Leach, Dana R.; Krummel, Matthew F.; Allison, James P. Enhancement of antitumor immunity by CTLA-4 blockade. 科學. 1996-03-22, 271 (5256): 1734–1736. PMID 8596936. doi:10.1126/science.271.5256.1734.使用|accessdate=需要含有|url= (帮助)
Harding, Fiona A.; McArthur, James G.; Gross, Jane A.; Raulet, David H.; Allison, James P. CD28-mediated signalling co-stimulates murine T cells and prevents induction of anergy in T-cell clones. 自然. 1992-04-16, 356 (6370): 607–609. PMID 1313950. doi:10.1038/356607a0.
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Walunas, Theresa L.; Lenschow, Deborah J.; Bakker, Christina Y.; Linsley, Peter S.; Freeman, Gordon J.; Green, Jonathan M.; Thompson, Craig B.; Bluestone, Jeffrey A. CTLA-4 can function as a negative regulator of T cell activation. 免疫(英语:Immunity (journal)). 1994-08, 1 (5): 405–413. PMID 7882171. doi:10.1016/1074-7613(94)90071-X.使用|accessdate=需要含有|url= (帮助)
Leach, Dana R.; Krummel, Matthew F.; Allison, James P. Enhancement of antitumor immunity by CTLA-4 blockade. 科學. 1996-03-22, 271 (5256): 1734–1736. PMID 8596936. doi:10.1126/science.271.5256.1734.使用|accessdate=需要含有|url= (帮助)
Walunas, Theresa L.; Lenschow, Deborah J.; Bakker, Christina Y.; Linsley, Peter S.; Freeman, Gordon J.; Green, Jonathan M.; Thompson, Craig B.; Bluestone, Jeffrey A. CTLA-4 can function as a negative regulator of T cell activation. 免疫(英语:Immunity (journal)). 1994-08, 1 (5): 405–413. PMID 7882171. doi:10.1016/1074-7613(94)90071-X.使用|accessdate=需要含有|url= (帮助)