Scrotifera Referensi
↑ Archibald, J. David; Zhang, Yue; Harper, Tony; Cifelli, Richard L. (6 Mei 2011). "Protungulatum , confirmed Cretaceous occurrence of an otherwise Paleocene eutherian (placental?) mammal" (PDF) . Journal of Mammalian Evolution . 18 (3): 153– 161. doi :10.1007/s10914-011-9162-1 . S2CID 16724836 . Diarsipkan dari asli (PDF) tanggal 3 Maret 2016. Diakses tanggal 28 April 2013 .
↑ Waddell, Peter J.; Cao, Ying; Hauf, Jöerg; Hasegawa, Masami (1 Maret 1999). Olmstead, R. (ed.). "Using Novel Phylogenetic Methods to Evaluate Mammalian mtDNA, Including Amino Acid-Invariant Sites-LogDet plus Site Stripping, to Detect Internal Conflicts in the Data, with Special Reference to the Positions of Hedgehog, Armadillo, and Elephant" . Systematic Biology (dalam bahasa Inggris). 48 (1): 31– 53. doi :10.1080/106351599260427 . ISSN 1076-836X . PMID 12078643 .
↑ Springer M. S., Murphy W. J., Eizirik E., O'Brien S. J. In: "Placental Mammals: Origins and Relationships of the Major Clades." Rose K. D., Archibald J., editor. Baltimore: Johns Hopkins; (2005.) "Molecular evidence for major placental clades"; pp. 37–49
↑ dos Reis, Mario; Inoue, Jun; Hasegawa, Masami; Asher, Robert J.; Donoghue, Philip C. J.; Yang, Ziheng (7 September 2012). "Phylogenomic datasets provide both precision and accuracy in estimating the timescale of placental mammal phylogeny" . Proceedings of the Royal Society B: Biological Sciences (dalam bahasa Inggris). 279 (1742): 3491– 3500. doi :10.1098/rspb.2012.0683 . ISSN 0962-8452 . PMC 3396900 . PMID 22628470 .
↑ Zhou, Xuming; Xu, Shixia; Xu, Junxiao; Chen, Bingyao; Zhou, Kaiya; Yang, Guang (1 Januari 2012). "Phylogenomic Analysis Resolves the Interordinal Relationships and Rapid Diversification of the Laurasiatherian Mammals" . Systematic Biology (dalam bahasa Inggris). 61 (1): 150– 64. doi :10.1093/sysbio/syr089 . ISSN 1063-5157 . PMC 3243735 . PMID 21900649 .