H. M. C.  Chiu and Morton, B., ?The morphological differentiation of two horseshoe crab species, Tachypleus tridentatus and Carcinoscorpius rotundicauda (Xiphosura), in Hong Kong with a regional Asian comparison?, Journal of Natural HistoryJournal of Natural History, vol. 37, pp. 2369-2382, 2003.