1. A second example of the weak antigen A4 occurring in the offspring of group O parents;Beckers;Vox Sanguinis,1955
2. A “new” blood group character related to the ABO system;Bhende;Lancet,1952
3. A family in which Ax is transmitted through a person of the blood group A2B;Cahan;Vor Sanguinis,1957
4. Somatic mosaicism for antigen A2;Cotterman;Acta genet. (Basel,195657