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^Paul, G.S. (1988). Predatory Dinosaurs of the World. Simon & Schuster:New York, 464 p. ISBN 0-671-61946-2
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^Csiki, G., and Grigorescu, D. (1998). Small theropods from the Late Cretaceous of the Hateg Basin (western Romania) - an unexpected diversity at the top of the food chain. Oryctos 1:87-104.
^Naish, D. (2004). Heptasteornis was no ornithomimid, troodontid, dromaeosaurid or owl: the first alvarezsaurid (Dinosauria: Theropoda) from Europe. Neus Jahrbuch für Geologie und Paläontologie, Mh. 7:385-401.
^Mortimer, Michael (2004): The Theropod Database: Phylogeny of taxa. Retrieved 2008-AUG-14.
^Holtz, Thomas R. Jr. (2011) Dinosaurs: The Most Complete, Up-to-Date Encyclopedia for Dinosaur Lovers of All Ages,Winter 2010 Appendix. （页面存档备份，存于互联网档案馆）
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