1. National Center for Biotechnology Information The Blood Group Antigen Gene Mutation Database: Alleles of the Rh Blood Group System 2014 http://www.ncbi.nlm.nih.gov/projects/gv/mhc/xslcgi.cgi?cmd=bgmut/systems_alleles&system=rh
2. V: a “new” Rh antigen, common in Negro, rare in white people;DeNatale;JAMA,1955
3. An Rh antibody specific for V and R′s;Sanger;Nature,1960
4. Molecular background of VS and weak C expression in blacks;Faas;Transfusion,1997