1. Evolution and function of the major histocompatibility system: facts and speculations;Klein,1977
2. Acute and chronic graft rejection: possible phylogeny of transplantation antigens;Cohen,1970
3. Immunologic diversity within the class Amphibia;Cohen,1976
4. Major and minor histocompatibility systems of ectothermic vertebrates;Cohen,1977
5. Phylogeny of the major histocompatibility complex: theoretical implications of studies with urodele amphibians;Cohen,1976