1. Adamoli VC, Cetica PD, Merani MS, Solari AJ (2001) Comparative morphologic placental types in Dasypodidae (Chaetophractus villosus, Cabassous chacoensis, Tolypeutes matacus and Dasypus hybridus). Biocell 25(1):17–22
2. Altmann F (1924) Beitrage zur Anatomie des weiblichen Genetales der Dasypodiden. Zs Ges Anat München 72:390–406
3. Bernirschke K (2004) Comparative placentation. Available from: URL: http://medicine.ucsd.edu/cpa/indxfs.html
4. Birabén M (1951) Semblanza de Miguel Fernández descubridor de la poliembrionía en los mamíferos. Ciencia e Investigación 7:224–229
5. Briskie JV, Montgomerie R (1992) Sperm size and sperm competition in birds. Proc R Soc Lond B 247:89–95