Proceratopyge (Proceratopyge) duibianensis
Revision of the Cambrian-Ordovician boundary stratotype sections in W. Zhejiang. Su, Zongwei[Ed]. Contribution to 27th International Geological Congress, 1984, Moscow. Developments in geoscience., Science Press, Beijing., 1984: i-vi, 1-677. Chapter pagination: 53-63. 56 [Zoological Record Volume 134]