^Late Cambrian conodonts of central Kazakhstan. GP Abaimova, Paleontologicheskii Zhurnal, 1978
^ abEarly Cambrian palaeobiogeography of the Zhenba–Fangxian Block (South China): Independent terrane or part of the Yangtze Platform?. Ben Yang, Michael Steiner and Helmut Keupp, Gondwana Research, 2015, volume 28 (4), pages 1543–1565, doi:10.1016/j.gr.2014.09.020
^Internal Structure of Cambrian Conodonts. K. J. Müller and I. Hinz-Schallreuter, Journal of Paleontology
volume 72, No. 1 (Jan., 1998), pages 91-112 (Stable URL)