↑ "Towards Resolving the Interordinal Relationships of Placental Mammals" (1999). Systematic Biology48 (1): 1–5. doi:10.1093/sysbio/48.1.1. PMID 12078634.
↑Arnason U., Adegoke J. A., Gullberg A., Harley E. H., Janke A., Kullberg M. (2008.) "Mitogenomic relationships of placental mammals and molecular estimates of their divergences." Gene.; 421(1–2):37–51
↑Nicole M. Foley, Victor C. Mason, Andrew J. Harris, Kevin R. Bredemeyer, Joana Damas, Harris A. Lewin, Eduardo Eizirik, John Gatesy, Elinor K. Karlsson, Kerstin Lindblad-Toh, Zoonomia Consortium, Mark S. Springer & William J. Murphy (2023-04-28). "A genomic timescale for placental mammal evolution". Science380 (6643). doi:10.1126/science.abl8189.