Klöppel G, Dege K, Remmele W, Kapran Y, Tuzlali S, Modlin IM. Siegfried Oberndorfer: a tribute to his work and life between Munich, Kiel, Geneva, and Istanbul. „Virchows Arch”, s. S3-7, 2007. DOI: 10.1007/s00428-007-0462-z. PMID: 17684760.
Modlin IM, Shapiro MD, Kidd M, Eick G. Siegfried Oberndorfer and the evolution of carcinoid disease. „Arch Surg”. 142 (2), s. 187-97, 2007. DOI: 10.1001/archsurg.142.2.187. PMID: 17309971.
Klöppel G. Oberndorfer and his successors: from carcinoid to neuroendocrine carcinoma. „Endocr Pathol”. 18 (3), s. 141-4, 2007. DOI: 10.1007/s12022-007-0021-9. PMID: 17960501.
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Klöppel G, Dege K, Remmele W, Kapran Y, Tuzlali S, Modlin IM. Siegfried Oberndorfer: a tribute to his work and life between Munich, Kiel, Geneva, and Istanbul. „Virchows Arch”, s. S3-7, 2007. DOI: 10.1007/s00428-007-0462-z. PMID: 17684760.
Modlin IM, Shapiro MD, Kidd M. Siegfried Oberndorfer: origins and perspectives of carcinoid tumors. „Hum Pathol”. 35. 12, s. 1440-51, 2004. PMID: 15619202.
Modlin IM, Shapiro MD, Kidd M, Eick G. Siegfried Oberndorfer and the evolution of carcinoid disease. „Arch Surg”. 142 (2), s. 187-97, 2007. DOI: 10.1001/archsurg.142.2.187. PMID: 17309971.
Klöppel G. Oberndorfer and his successors: from carcinoid to neuroendocrine carcinoma. „Endocr Pathol”. 18 (3), s. 141-4, 2007. DOI: 10.1007/s12022-007-0021-9. PMID: 17960501.