Waddell, Peter J.; Cao, Ying; Hauf, Jöerg & Hasegawa, Masami. 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(英语:Systematic Biology). 1999, 48 (1): 31–53. PMID 12078643. doi:10.1080/106351599260427.
Waddell, Peter J.; Cao, Ying; Hauf, Jöerg & Hasegawa, Masami. 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(英语:Systematic Biology). 1999, 48 (1): 31–53. PMID 12078643. doi:10.1080/106351599260427.
Waddell, Peter J.; Cao, Ying; Hauf, Jöerg & Hasegawa, Masami. 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(英语:Systematic Biology). 1999, 48 (1): 31–53. PMID 12078643. doi:10.1080/106351599260427.