†Duyunaspis (Zhange & Qian MS T-M Zhou Liu et al )

(Zhange & Qian MS T-M Zhou Liu et al ). [Trilobita.] Wang, Xiao-feng; Jin, Yu-qin[Eds]. [Paleontological Handbook of central and southern China. pt. 1. Early Palaeozoic Era.], Earth Sciences Press, Peking, 1977: 1-470, 116 pls.. Chapter pagination: 104-266, pls.33-81