Kembar: Perbedaan antara revisi

* {{Cite journal | author=Wenk RE, Houtz T, Brooks M, Chiafari FA | title=How frequent is heteropaternal superfecundation? |journal=Acta geneticae medicae et gemellologiae | uear=1992 | volume=41 | issue=1 | pages=43-7 }} PMID 1488855

* {{Cite journal | author=Girela E, Lorente JA, Alvarez JC, Rodrigo MD, Lorent M, Villaneuva E | journal=Fertility and Sterility | title=Indisputable double paternity in dizygous twins |year=1997 | volume=67 | issue=6 | pages=1159-61 }} PMID 9176461

 

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