1. Anticholinergicaided study of the gastrointestinal tract;Ferrucci;Radiologic Clinics of North America,1971
2. Barium enteroclysis. A method for direct immediate visualisation of the small intestine by double contrast;Gershon Cohen;American Journal of Roentgenology,1939
3. Mise en evidence de l'intestine grele par une nouvelle technique radiologique;Ghelew;Presse Medicale,1938
4. Tubeless hypotonic duodenography. Value, technique, limitations;Martel;American Journal of Roentgenology, Radium Therapy and Nuclear Medicine,1969
5. The double contrast examination of the small intestine. Preliminary communication of a new technique;Pajewski;Clinical Radiology,1970