Xing, Lida, and Martin G. Lockley. “Theropod Tracks from the Jurassic–Cretaceous Boundary, Tuchengzi Formation, Chengde, China: Review and New Observations”. Biosis: Biological Systems 2, no. 2 (June 22, 2021): 271–282. Accessed April 23, 2024. https://eaapublishing.org/journals/index.php/biosis/article/view/102.