^"Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
^"Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
^Olives B, Mattei MG, Huet M, Neau P, Martial S, Cartron JP, Bailly P (Aug 1995). "Kidd blood group and urea transport function of human erythrocytes are carried by the same protein". J Biol Chem. 270 (26): 15607–10. doi:10.1074/jbc.270.26.15607. PMID7797558.{{cite journal}}: CS1 maint: unflagged free DOI (link)