Punt, J. A., Havran, W., Abe, R., Sarin, A., & Singer, A. (1997). T Cell Receptor (TCR)-induced Death of Immature CD4(+)CD8(+) Thymocytes by Two Distinct Mechanisms Differing in Their Requirement for CD28 Costimulation: Implications for Negative Selection in the Thymus. The Rockefeller University Press.

Punt, Jennifer A., Wendy Havran, Ryo Abe, Apurva Sarin, và Alfred Singer. T Cell Receptor (TCR)-induced Death of Immature CD4(+)CD8(+) Thymocytes By Two Distinct Mechanisms Differing in Their Requirement for CD28 Costimulation: Implications for Negative Selection in the Thymus. The Rockefeller University Press, 1997.

Punt, Jennifer A., et al. T Cell Receptor (TCR)-induced Death of Immature CD4(+)CD8(+) Thymocytes By Two Distinct Mechanisms Differing in Their Requirement for CD28 Costimulation: Implications for Negative Selection in the Thymus. The Rockefeller University Press, 1997.