Sereno P. C. (1993). "The pectoral girdle and forelimb of the basal theropod Herrerasaurus ischigualastensis". Journal of Vertebrate Paleontology. 13 (4): 425–450. doi:10.1080/02724634.1994.10011524.
Canup, R. M.; Asphaug, E. (2001). "An impact origin of the Earth-Moon system". Abstract #U51A-02. American Geophysical Union. Bibcode:2001AGUFM.U51A..02C.