B. von Ditfurth

Risks of intestinal anastomoses in Crohn's disease.

C. Herfarth, S. Post, G. Schürmann, 1991, Annals of surgery.

Influence of endorectal ultrasound on surgical treatment of rectal cancer.

P. Schlag, C. Herfarth, F. Glaser, 1990, European journal of surgical oncology : the journal of the European Society of Surgical Oncology and the British Association of Surgical Oncology.