Chang TT، Kuchroo VK، Sharpe AH (فبراير 2002). "Role of the B7-CD28/CTLA-4 pathway in autoimmune disease". Current Directions in Autoimmunity. Current Directions in Autoimmunity. ج. 5: 113–30. DOI:10.1159/000060550. ISBN:3-8055-7308-1. PMID:11826754.
Chang TT، Kuchroo VK، Sharpe AH (فبراير 2002). "Role of the B7-CD28/CTLA-4 pathway in autoimmune disease". Current Directions in Autoimmunity. Current Directions in Autoimmunity. ج. 5: 113–30. DOI:10.1159/000060550. ISBN:3-8055-7308-1. PMID:11826754.