^Cloutier, Richard; Ahlberg, Per E. Morphology, characters, and the interrelationships of basal sarcopterygians. Stiassny, Melanie L.J.; Parenti, Lynn R.; Johnson, G. David (编). Interrelationships of Fishes. San Diego: Academic Press. 1996: 445–479. ISBN 978-0-12-670951-3.
^Mammaliformes. Palaeos: The Trace of Life on Earth. [2008-01-25]. (原始内容存档于2008-06-04).