Khayyamian, S., Hutloff, A., Büchner, K., Gräfe, M., Henn, V., Kroczek, R. A., & Mages, H. W. (2002). ICOS-Ligand, Expressed on Human Endothelial Cells, Costimulates Th1 and Th2 Cytokine Secretion by Memory CD4+ T Cells. Proceedings of the National Academy of Sciences of the United States of America, 99(9), 6198-6203.

Khayyamian, Saman, Andreas Hutloff, Kerstin Büchner, Michael Gräfe, Volker Henn, Richard A. Kroczek, and Hans W. Mages. "ICOS-Ligand, Expressed on Human Endothelial Cells, Costimulates Th1 and Th2 Cytokine Secretion by Memory CD4+ T Cells." Proceedings of the National Academy of Sciences of the United States of America 99, no. 9 (2002): 6198-6203.

Khayyamian, Saman, et al. "ICOS-Ligand, Expressed on Human Endothelial Cells, Costimulates Th1 and Th2 Cytokine Secretion by Memory CD4+ T Cells." Proceedings of the National Academy of Sciences of the United States of America, vol. 99, no. 9, 2002, pp. 6198-6203.