Heckert, A.B. & Lucas, S.G. & Krzyzanowski, S.E. (2003)
Vertebrate fauna of the late Campanian (Judithian) Fort Crittenden Formation, and the age of Cretaceous vertebrate faunas of southeastern Arizona (U.S.A.) Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen, 227(3), 343–364