Nancy B. Simmons, Kevin L. Seymour, Jörg Habersetzer & Gregg F. Gunnell «Primitive Early Eocene bat from Wyoming and the evolution of flight and echolocation». nature, 451, 2008, pàg. 818. DOI: 10.1038/nature06549.
Mallo M «Formation of the middle ear: recent progress on the developmental and molecular mechanisms». Dev. Biol., 231, 2, Març 2001, pàg. 410-9. DOI: 10.1006/dbio.2001.0154. PMID: 11237469.
Raff RA «Written in stone: fossils, genes and evo-devo». Nat. Rev. Genet., 8, 12, Desembre 2007, pàg. 911-20. DOI: 10.1038/nrg2225. PMID: 18007648.
Wilson J, Tucker AS «Fgf and Bmp signals repress the expression of Bapx1 in the mandibular mesenchyme and control the position of the developing jaw joint». Dev. Biol., 266, 1, Febrer 2004, pàg. 138-50. DOI: 10.1016/j.ydbio.2003.10.1012. PMID: 14729484.
Tucker AS, Watson RP, Lettice LA, Yamada G, Hill RE «Bapx1 regulates patterning in the middle ear: altered regulatory role in the transition from the proximal jaw during vertebrate evolution». Development, 131, 6, March 2004, pàg. 1235-45. DOI: 10.1242/dev.01017. PMID: 14973294.
Crompton, A. W.; Jenkins, F. A. Jr «Mammals from Reptiles: A Review of Mammalian Origins». Annual Review of Earth and Planetary Sciences, 1, 1973, pàg. 131-155. DOI: 10.1146/annurev.ea.01.050173.001023.
Mallo M «Formation of the middle ear: recent progress on the developmental and molecular mechanisms». Dev. Biol., 231, 2, Març 2001, pàg. 410-9. DOI: 10.1006/dbio.2001.0154. PMID: 11237469.
Raff RA «Written in stone: fossils, genes and evo-devo». Nat. Rev. Genet., 8, 12, Desembre 2007, pàg. 911-20. DOI: 10.1038/nrg2225. PMID: 18007648.
Wilson J, Tucker AS «Fgf and Bmp signals repress the expression of Bapx1 in the mandibular mesenchyme and control the position of the developing jaw joint». Dev. Biol., 266, 1, Febrer 2004, pàg. 138-50. DOI: 10.1016/j.ydbio.2003.10.1012. PMID: 14729484.
Tucker AS, Watson RP, Lettice LA, Yamada G, Hill RE «Bapx1 regulates patterning in the middle ear: altered regulatory role in the transition from the proximal jaw during vertebrate evolution». Development, 131, 6, March 2004, pàg. 1235-45. DOI: 10.1242/dev.01017. PMID: 14973294.
Vorbach C, Capecchi MR, i Penninger JM: «Evolution of the mammary gland from the innate immune system?». Bioessays, 28, 6, 2006. PMID: 1670006.
OFTEDAL, OT «The mammary gland and its origin during synapsid evolution». J Mammary Gland Biol Neoplasia., 7, 3, 2002. PMID: 12751889.
Peter J. Bryant. «Chapter 3: The Age of Mammals» (E-llibre). Biodiversity and Conservation, 2002. Arxivat de l'original el 2008-12-16. [Consulta: 29 desembre 2008].
Peter J. Bryant. «Chapter 3: The Age of Mammals» (E-llibre). Biodiversity and Conservation, 2002. Arxivat de l'original el 2008-12-16. [Consulta: 29 desembre 2008].
Alan Kazlev. «The Cenozoic». Palaeos.com, 2002. Arxivat de l'original el 2008-05-01. [Consulta: 29 desembre 2008].