↑Hausmann, H. (1988). "[Ernst Unger (1875-1938)--a pioneer in kidney transplantation. On the 50th anniversary of the death of the Berlin surgeon]". Zeitschrift für Ärztliche Fortbildung. 82 (17): 843–845. ISSN0044-2178. PMID3062920.
↑Hamilton, David (2012). A history of organ transplantation: ancient legends to modern practice. Pittsburgh, Pennsylvania. p.448. ISBN9780822977841.{{cite book}}: CS1 maint: location missing publisher (link)
↑Petechuk, David (2006). Organ transplantation. Westport, Conn.: Greenwood Press. p.180. ISBN9780313335426.