O'Leary, Maureen A.; Lucas, Spencer G.; Williamson, Thomas E. (2000). "A new specimen of Ankalagon (Mammalia, Mesonychia) and evidence of sexual dimorphism in mesonychians". Journal of Vertebrate Paleontology. 20 (2): 387–93. doi:10.1671/0272-4634(2000)020[0387:ANSOAM]2.0.CO;2. JSTOR4524103.
O'Leary, Maureen A.; Rose, Kenneth D. (1995). "Postcranial Skeleton of the Early Eocene Mesonychid Pachyaena (Mammalia: Mesonychia)". Journal of Vertebrate Paleontology. 15 (2): 401–430. doi:10.1080/02724634.1995.10011238. ISSN0272-4634. JSTOR4523639.
O'Leary, Maureen A.; Lucas, Spencer G.; Williamson, Thomas E. (2000-06-27). "A new specimen of Ankalagon (Mammalia, Mesonychia) and evidence of sexual dimorphism in mesonychians". Journal of Vertebrate Paleontology. 20 (2): 387–393. doi:10.1671/0272-4634(2000)020[0387:ANSOAM]2.0.CO;2. ISSN0272-4634.
Geisler, Jonathan H.; Uhen, Mark D. (2003). "Morphological support for a close relationship between hippos and whales". Journal of Vertebrate Paleontology. 23 (4): 991–6. doi:10.1671/32. JSTOR4524409. S2CID59143599.
Geisler, Jonathan H.; Uhen, Mark D. (2005). "Phylogenetic Relationships of Extinct Cetartiodactyls: Results of Simultaneous Analyses of Molecular, Morphological, and Stratigraphic Data". Journal of Mammalian Evolution. 12 (1–2): 145–60. doi:10.1007/s10914-005-4963-8. S2CID34683201.
O'Leary, Maureen A.; Lucas, Spencer G.; Williamson, Thomas E. (2000). "A new specimen of Ankalagon (Mammalia, Mesonychia) and evidence of sexual dimorphism in mesonychians". Journal of Vertebrate Paleontology. 20 (2): 387–93. doi:10.1671/0272-4634(2000)020[0387:ANSOAM]2.0.CO;2. JSTOR4524103.
O'Leary, Maureen A.; Rose, Kenneth D. (1995). "Postcranial Skeleton of the Early Eocene Mesonychid Pachyaena (Mammalia: Mesonychia)". Journal of Vertebrate Paleontology. 15 (2): 401–430. doi:10.1080/02724634.1995.10011238. ISSN0272-4634. JSTOR4523639.
Geisler, Jonathan H.; Uhen, Mark D. (2003). "Morphological support for a close relationship between hippos and whales". Journal of Vertebrate Paleontology. 23 (4): 991–6. doi:10.1671/32. JSTOR4524409. S2CID59143599.
Geisler, Jonathan H.; Uhen, Mark D. (2003). "Morphological support for a close relationship between hippos and whales". Journal of Vertebrate Paleontology. 23 (4): 991–6. doi:10.1671/32. JSTOR4524409. S2CID59143599.
Geisler, Jonathan H.; Uhen, Mark D. (2005). "Phylogenetic Relationships of Extinct Cetartiodactyls: Results of Simultaneous Analyses of Molecular, Morphological, and Stratigraphic Data". Journal of Mammalian Evolution. 12 (1–2): 145–60. doi:10.1007/s10914-005-4963-8. S2CID34683201.
O'Leary, Maureen A.; Rose, Kenneth D. (1995). "Postcranial Skeleton of the Early Eocene Mesonychid Pachyaena (Mammalia: Mesonychia)". Journal of Vertebrate Paleontology. 15 (2): 401–430. doi:10.1080/02724634.1995.10011238. ISSN0272-4634. JSTOR4523639.
O'Leary, Maureen A.; Lucas, Spencer G.; Williamson, Thomas E. (2000-06-27). "A new specimen of Ankalagon (Mammalia, Mesonychia) and evidence of sexual dimorphism in mesonychians". Journal of Vertebrate Paleontology. 20 (2): 387–393. doi:10.1671/0272-4634(2000)020[0387:ANSOAM]2.0.CO;2. ISSN0272-4634.