Chang TT, Kuchroo VK, Sharpe AH (Feb 2002). "Role of the B7-CD28/CTLA-4 pathway in autoimmune disease". Signal Transduction Pathways in Autoimmunity. Current Directions in Autoimmunity. Vol. 5. pp. 113–30. doi:10.1159/000060550. ISBN3-8055-7308-1. PMID11826754.
Chang TT, Kuchroo VK, Sharpe AH (Feb 2002). "Role of the B7-CD28/CTLA-4 pathway in autoimmune disease". Signal Transduction Pathways in Autoimmunity. Current Directions in Autoimmunity. Vol. 5. pp. 113–30. doi:10.1159/000060550. ISBN3-8055-7308-1. PMID11826754.