1. A second example of the weak antigen A4 occurring in the offspring of group O parents;Beckers;Vox Sang.,1955
2. A family in which AX is transmitted through a person of the bloodgroup A2B;Cahan;Vox Sang.,1957
3. An A4 CDue/cde blood in an English family;Dunsford;Ann. Eugen., Lond.,1952