1. Incidence of conjoined twinning;Hanson;Lancet,1975
2. Report of the autopsy of the Siamese twins together with other interesting information covering their life—A sketch of the life of Chang and Eng;Luckhardt;Surg Gynecol Obstet,1941
3. Separation of conjoined thoracopagus twins with report of an additional case;Simpson;Can J Surg,1969
4. General clinical management of thoracopagus twins;Nichols,1967
5. Sequential scintiangiography of the hepato-splenic system of xiphopagus conjoined twins;Margouleff;J Nucl Med,1980