1. Strauss S, Tamarkin M, Engelberg S, et al.Prenatal sonographic appearance of diprosopus.J Ultrasound Med1987; 6:93-95.
2. Diprosopus: diagnosis in utero
3. Chervenak FA, Pinto MM, Heller CI, et al.Obstetric significance of fetal craniofacial duplication: a case report.J Reprod Med1985; 30:74-76.
4. Baldwin VJ.Pathology of multiple pregnancy.In: Wigglesworth JS, Singer DB, eds.Textbook of fetal and perinatal pathology.Boston, Mass: Blackwell, 1991; 306-343.
5. Guttmacher AF, Nichols BL.Teratology of conjoined twins.Birth Def1967; 3:3-9.