Fife BT, Pauken KE (January 2011). "The role of the PD-1 pathway in autoimmunity and peripheral tolerance". Annals of the New York Academy of Sciences. 1217: 45–59. doi:10.1111/j.1749-6632.2010.05919.x. PMID21276005.
Shinohara T, Taniwaki M, Ishida Y, Kawaichi M, Honjo T (October 1994). "Structure and chromosomal localization of the human PD-1 gene (PDCD1)". Genomics. 23 (3): 704–6. doi:10.1006/geno.1994.1562. PMID7851902.
Gandini S, Massi D, Mandalà M (April 2016). "PD-L1 expression in cancer patients receiving anti PD-1/PD-L1 antibodies: A systematic review and meta-analysis". Critical Reviews in Oncology/Hematology. 100: 88–98. doi:10.1016/j.critrevonc.2016.02.001. PMID26895815.
Fife BT, Pauken KE (January 2011). "The role of the PD-1 pathway in autoimmunity and peripheral tolerance". Annals of the New York Academy of Sciences. 1217: 45–59. doi:10.1111/j.1749-6632.2010.05919.x. PMID21276005.
Shinohara T, Taniwaki M, Ishida Y, Kawaichi M, Honjo T (October 1994). "Structure and chromosomal localization of the human PD-1 gene (PDCD1)". Genomics. 23 (3): 704–6. doi:10.1006/geno.1994.1562. PMID7851902.
Gandini S, Massi D, Mandalà M (April 2016). "PD-L1 expression in cancer patients receiving anti PD-1/PD-L1 antibodies: A systematic review and meta-analysis". Critical Reviews in Oncology/Hematology. 100: 88–98. doi:10.1016/j.critrevonc.2016.02.001. PMID26895815.