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Butler, R. J. and Porro, L. B. and Heckert, A. B. (2006) A supposed heterodontosaurid tooth from the Rhaetian of Switzerland and a reassessment of the European Late Triassic record of Ornithischia (Dinosauria). Neues Jahrbuch für Geologie und Paläontologie: Monatshefte, 10. pp. 613-633.