1. Hill, C. R. Coprolites of Ptiliophyllum cuticles from the Middle Jurassic of North Yorkshire. Bull. Br. Mus. Nat. Hist. 27, 289–294 (1976).
2. Chin, K. 7amp; Gill, B. D. Dinosaurs, dung beetles, and conifers: participants in a Cretaceous food web. Palaios 11, 280–285 (1996).
3. Chin, K. 7amp; Kirkland, J. I. Probable herbivore coprolites from the Upper Jurassic Mygatt-Moore Quarry, Western Colorado. Mod. Geol. 23, 249–276 (1998).
4. Bertrand, C. E. Les Coprolithes de Bernissart. I. partie: Les Coprolithes qui ont ete attribues aux Iguanodons. Royal Musee Hist. Nat. Belgique Mem. 1, 1–154 (1903).
5. Matley, C. A. The coprolites of Pijdura, Central Provinces. Geol. Surv. Recs. 74, 535–547 (1939).