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Baur, G.; Case, E.C. (1899). „The history of the Pelycosauria, with a description of the genus Dimetrodon, Cope”. Transactions of the American Philosophical Society. 20 (1): 5—62. JSTOR1005488. doi:10.2307/1005488. hdl:2027/uc1.32106020416696.
Sullivan, C.; Reisz, R.R.; May, W.J. (2000). „Large dissorophoid skeletal elements from the Lower Permian Richards Spur fissures, Oklahoma, and their paleoecological implications”. Journal of Vertebrate Paleontology. 20 (3): 456—461. JSTOR4524117. S2CID140709673. doi:10.1671/0272-4634(2000)020[0456:LDSEFT]2.0.CO;2.
Olson, E.C. (1966). „Community evolution and the origin of mammals”. Ecology. 47 (2): 291—302. JSTOR1933776. doi:10.2307/1933776.
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Baur, G.; Case, E.C. (1899). „The history of the Pelycosauria, with a description of the genus Dimetrodon, Cope”. Transactions of the American Philosophical Society. 20 (1): 5—62. JSTOR1005488. doi:10.2307/1005488. hdl:2027/uc1.32106020416696.
Kriloff, A.; Germain, D.; Canoville, A.; Vincent, P.; Sache, M.; Laurin, M. (2008). „Evolution of bone microanatomy of the tetrapod tibia and its use in palaeobiological inference”. Journal of Evolutionary Biology. 21 (3): 807—826. PMID18312321. S2CID6102313. doi:10.1111/j.1420-9101.2008.01512.x.
Sullivan, C.; Reisz, R.R.; May, W.J. (2000). „Large dissorophoid skeletal elements from the Lower Permian Richards Spur fissures, Oklahoma, and their paleoecological implications”. Journal of Vertebrate Paleontology. 20 (3): 456—461. JSTOR4524117. S2CID140709673. doi:10.1671/0272-4634(2000)020[0456:LDSEFT]2.0.CO;2.
Kriloff, A.; Germain, D.; Canoville, A.; Vincent, P.; Sache, M.; Laurin, M. (2008). „Evolution of bone microanatomy of the tetrapod tibia and its use in palaeobiological inference”. Journal of Evolutionary Biology. 21 (3): 807—826. PMID18312321. S2CID6102313. doi:10.1111/j.1420-9101.2008.01512.x.
Baur, G.; Case, E.C. (1899). „The history of the Pelycosauria, with a description of the genus Dimetrodon, Cope”. Transactions of the American Philosophical Society. 20 (1): 5—62. JSTOR1005488. doi:10.2307/1005488. hdl:2027/uc1.32106020416696.