Hilgard P, Oberholzer K, Meyer zum Büschenfelde KH, Hohenfellner R, Gerken G. [The "nutcracker syndrome" of the renal vein (superior mesenteric artery syndrome) as the cause of gastrointestinal complaints]. Dtsch. Med. Wochenschr. July 1998, 123 (31–32): 936–40. PMID 9721569. doi:10.1055/s-2007-1024101(德语).
Hilgard P, Oberholzer K, Meyer zum Büschenfelde KH, Hohenfellner R, Gerken G. [The "nutcracker syndrome" of the renal vein (superior mesenteric artery syndrome) as the cause of gastrointestinal complaints]. Dtsch. Med. Wochenschr. July 1998, 123 (31–32): 936–40. PMID 9721569. doi:10.1055/s-2007-1024101(德语).