8Schenkel Brunner H. Human blood groups. New York: Spinger Verlag Wien. 1995:112 - 114.
9Wallace ME, Gibbs FL. Blood group systems: ABH and Lewis. Bethesda: American Association of Blood Bank. 1986:274 -275.
10Heier HE, Kornstad L, Namork E, et al. Expreession of B and H antigens on red cells from a group B (weak) individual studied by serologic and scanning election microscopic technigues, Immunohematology, 1992; 8(4) : 94 -99.
