Langenbecks Archiv Fur Chirurgie. Supplement II, Verhandlungen Der Deutschen Gesellschaft Fur Chirurgie. Deutsche Gesellschaft Fur Chirurgie. Kongress|January 1, 1990
Nephrology, Dialysis, Transplantation : Official Publication of the European Dialysis and Transplant Association - European Renal Association|May 18, 1999
Langenbecks Archiv Fur Chirurgie. Supplement II, Verhandlungen Der Deutschen Gesellschaft Fur Chirurgie. Deutsche Gesellschaft Fur Chirurgie. Kongress|January 1, 1990
Nephrology, Dialysis, Transplantation : Official Publication of the European Dialysis and Transplant Association - European Renal Association|May 18, 1999