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nih.gov
pubmed.ncbi.nlm.nih.gov
J.D.Arlikar; S.B.Mane; N.P.Dhende; Y.Sanghavi; A.G.Valand; P.R.Butale (2009). “Fetus in fetu: two case reports and review of literature”. Pediatr Surg Int25 (3): 289-292. doi:10.1007/s00383-009-2328-8. PMID19184054.
Ajay N Gangopadhyay; Arvind Srivastava; Punit Srivastava; Dinesh K Gupta (2010). “Twin fetus in fetu in a child: a case report and review of the literature”. J Med Case Reports4 (96). doi:10.1186/1752-1947-4-96. PMID20338036.