R. E. Weems and J. M. Bachman. 2015. The Lower Cretaceous Patuxent Formation ichnofauna of Virginia. Ichnos 22(3–4):209-219
DOI ↗
S. G. Lucas and A. P. Hunt. 2006. Dinosaur tracks from the Upper Cretaceous Menefee Formation, west-central New Mexico. Late Cretaceous Vertebrates from the Western Interior. New Mexico Museum of Natural History and Science Bulletin 35:79-81
M. Matsukawa, M. G. Lockley, and A. P. Hunt. 1999. Three age groups of ornithopods inferred from footprints in the mid-Cretaceous Dakota Group, eastern Colorado, North America. Palaeogeography, Palaeoclimatology, Palaeoecology 147:39-51
DOI ↗
A. P. Hunt and S. G. Lucas. 1998. Tetrapod ichnofaunas from the Lower Cretaceous of northeastern New Mexico, USA. Lower and Middle Cretaceous Terrestrial Ecosystems, New Mexico Museum of Natural History and Science Bulletin 14:163-167
M. G. Lockley. 1987. Dinosaur footprints from the Dakota Group of eastern Colorado. The Mountain Geologist 24(4):107-122
DOI ↗