1. Über Volvulus coli transversi;Kallio;Acta chir. Scandinav.,1932
2. Volvulus of colon;Gerwig;Arch. Surg.,1950
3. Roentgen diagnosis of volvulus of sigmoid with obstruction;Ritvo;Am. J. Roentgenol.,1946
4. Volvulus of the colon;Michel;South. Surgeon,1948
5. Lesions of the colon, rectum, anus and appendix;Brust;Clinical Radiology,1947