case-report 2010 [Young woman with recurrent cramping abdominal pain. What is in back of the submucous space occupying lesion of the sigmoid colon?] MMW Fortschritte der Medizin ·doi:10.1007/BF03366590
case-report 2007 [Tumorous lesion in the sigmoid. Was it really a carcinoma?] MMW Fortschritte der Medizin ·doi:10.1007/BF03364970