^Rubel, M. (2011). "Silurian brachiopods Dictyonellida, Strophomenida, Productida, Orthotetida, Protorthida and Orthida from Estonia". Fossilia Baltica. 4: 1–65.
^Williams, Alwyn; Brunton, C.H.C.; Carlson, S.J.; et al. (1997–2007). Kaesler, Roger L.; Selden, Paul (eds.). Part H, Brachiopoda (Revised). Treatise on Invertebrate Paleontology. Boulder, Colorado; Lawrence, Kansas: Geological Society of America; University of Kansas.
^Liang, W.P. (1990). "Lengwu Formation of Permian and its Brachiopod Fauna in Zhejiang Province". Geological Memoirs. 2 (10): 1–522.
^Hoare, R.D. (1961). "Desmoinesian Brachiopoda and Mollusca from southwest Missouri". Missouri University Studies. 36: 1–262.