Zhao Xijin; Cheng Zhengwu & Xu Xing (1999) [1999-12-13]. "The earliest ceratopsian from the Tuchengzi Formation of Liaoning, China". Journal of Vertebrate Paleontology. 19 (4): 681–691. doi:10.1080/02724634.1999.10011181.
Zhao Xijin; Cheng Zhengwu; Xu Xing & Makovicky, Peter J. (2006). "A new ceratopsian from the Upper Jurassic Houcheng Formation of Hebei, China". Acta Geologica Sinica. 80 (4): 467–473. doi:10.1111/j.1755-6724.2006.tb00265.x. S2CID129077483.
Zhao Xijin; Cheng Zhengwu; Xu Xing & Makovicky, Peter J. (2006). "A new ceratopsian from the Upper Jurassic Houcheng Formation of Hebei, China". Acta Geologica Sinica. 80 (4): 467–473. doi:10.1111/j.1755-6724.2006.tb00265.x. S2CID129077483.