1. Billingham RE, Boswell T . Studies on the problem of corneal homografts. Proc R Soc Lond B 1953; 141: 293–406.
2. Medawar P . Immunity to homologous grafted skin. III. The fate of skin homografts transplanted to the brain, to subcutaneous tissue, and to the anterior chamber of the eye. Br J Exp Pathol 1948; 29: 58–69.
3. Brady SE, Rapuano CJ, Arentsen JJ, Cohen EJ, Laibson PR . Clinical indications for and procedures associated with penetrating keratoplasty. Am J Ophthalmol 1989; 108: 983–988.
4. Williams KA, Coster DJ . Penetrating corneal transplantation in the inbred rat: a new model. Invest Ophthalmol Vis Sci 1985; 26: 23–30.
5. Streilein JW . Immunobiology and immunopathology of corneal transplantation. In: Streilein JW (ed). Immune Response and the Eye. Karger, Basel, Switzerland, 1999, pp 186–207.