Foster, John; Lockley, Martin (1997). «Probable crocodilian tracks and traces from the Morrison Formation (Upper Jurassic) of eastern Utah». Ichnos. 5 (2): 121–129. Bibcode:1997Ichno...5..121F. doi:10.1080/10420949709386411
Foster, John (2015). «Theropod dinosaur ichnogenus Hispanosauropus identified from the Morrison Formation (Upper Jurassic), western North America». Ichnos. 22 (3–4): 183–191. Bibcode:2015Ichno..22..183F. doi:10.1080/10420940.2015.1059335
Foster, John; Lockley, Martin (1997). «Probable crocodilian tracks and traces from the Morrison Formation (Upper Jurassic) of eastern Utah». Ichnos. 5 (2): 121–129. Bibcode:1997Ichno...5..121F. doi:10.1080/10420949709386411
Foster, John (2015). «Theropod dinosaur ichnogenus Hispanosauropus identified from the Morrison Formation (Upper Jurassic), western North America». Ichnos. 22 (3–4): 183–191. Bibcode:2015Ichno..22..183F. doi:10.1080/10420940.2015.1059335