Parkhaev, P.U.; Demidenko, Y.E. (2010). «Zooproblematica and mollusca from the Lower Cambrian Meishucun section (Yunnan, China) and taxonomy and systematics of the Cambrian small shelly fossils of China». Paleontological Journal. 44 (8): 883–1161. doi:10.1134/S0031030110080010