1. Leukocyte antibodies: occurrence in primigravidae;Ahrons;Tissue Antigens,1971
2. Immunological aspects of the equine endometrial cup reaction;Allen,1975
3. Maternal recognition of pregnancy and immunological implications of trophoblast-endometrium interactions in equids;Allen,1979
4. Immunological aspects of the equine endometrial cup reaction and the effect of xenogeneic extraspecies pregnancy in horses and donkeys;Allen,1982
5. Immunological studies on foeto-maternal relationships in equine pregnancy;Allen,1983