1. The red cell antigen Pk and its relationship to the P system: the evidence of three more Pk families;Kortekangas;Vox Sang.,1965
2. A second family with the red cell antigen Pk;Kortekangas;Vox Sang.,1959
3. The specificity of the antibody in paroxysmal cold hemoglobinuria (P.C.H.);Levine;Transfusion (Philad.),1963
4. A ‘new’ antigen and antibody belonging to the P blood group system;Matson;Amer. J. hum. Genet.,1959