1. Permian climatic cooling in the Canadian Arctic;Beauchamp,1994
2. Perm-Conodonten;Bender;Geol. Jahrbuch,1965
3. Upper Permian and Triassic conodont faunas from the type area of the Cache Creek Complex, south-central British Columbia, Canada;Beyers,1991
4. Ching, Y. (Jin Yugan), 1960. Conodonts from the Kufeng Suite (Permian) of Lungtan, Nanking. Acta Palaeontol. Sin. 8(3), 169–190.
5. Conodonts and biostratigraphy of the Permian;Clark;Geol. Soc. Am. Mem.,1971