1. A study of 50,000 specimens of human vermiform appendix;Collins;Surg Gynecol Obstet,1955
2. Appendix vermiform duplex;Cave;J Anat,1936
3. Double appendix;Wallbridge;Br J Surg,1962
4. Horseshoe anomaly of the appendix: a previously undescribed entity;Mesko;Surgery,1989
5. Appendix vermiformis duplex;Waugh;Arch Surg,1941