1. Placentation;Amoroso,1952
2. Timing and biogeography of the eutherian radiation: fossils and molecules compared;Archibald;Mol. Phylogenet. Evol.,2003
3. Pregnancy;Badwaik,2000
4. Morphometric data and questions concerning placental transfer;Baur;Placenta,1981
5. Placenta und Uterusschleimhaut von Tamandua tetradactyla (Myrmecophaga);Becher;Gegenbaurs Morphol. Jahrb.,1931