Olsen, P. E.; Baird, D.,. (1986). The ichnogenus Atreipus and its significance for Triassic Biostratigraphy: In K. Padian (ed.), The Beginning of the Age of Dinosaurs, Fauna! Change Across the Triassic-Jurassic Boundary, Cambridge University Press, New York, p. 61-87.
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Olsen, P. E.; Baird, D.,
1986
The ichnogenus Atreipus and its significance for Triassic Biostratigraphy: In K. Padian (ed.), The Beginning of the Age of Dinosaurs, Fauna! Change Across the Triassic-Jurassic Boundary, Cambridge University Press, New York, p. 61-87.