Zawiskie, J.M.; Dawley, R.M.; Nesbitt, S.J. (2011). The relationships and type locality of Heptasuchus clarki, Popo Agie Formation of the Chugwater Group (Middle to Upper Triassic), Southeastern Big Horn Mountains, Wyoming, USA. Journal of Vertebrate Paleontology. 31 (Supp. 1): 219. doi:10.1080/02724634.2011.10635174. S2CID220413632.
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Zawiskie, J.M.; Dawley, R.M.; Nesbitt, S.J. (2011). The relationships and type locality of Heptasuchus clarki, Popo Agie Formation of the Chugwater Group (Middle to Upper Triassic), Southeastern Big Horn Mountains, Wyoming, USA. Journal of Vertebrate Paleontology. 31 (Supp. 1): 219. doi:10.1080/02724634.2011.10635174. S2CID220413632.