1. Arendt YA (2012) Traces of Augoichnus dituberculatus gen. et sp. nov. on Hypermorphocrinus magnospinosus from the Lower Permian of Cisuralia. Paleont J 46:886–893
2. Ohio geological survey bulletin;WI Ausich,1996
3. Ausich WI (1999) Upper Ordovician of the Cincinnati, Ohio area, USA. In: Hess H, Ausich WI, Brett CE, Simms MJ (eds) Fossil Crinoids. Cambridge University Press, Cambridge
4. Ausich WI (2001) Echinoderm taphonomy. In: Jangoux M, Lawrence JM (eds) Echinoderm Studies 6. A. A. Balkema, Rotterdam
5. Austin T, Austin T (1843) Monograph on recent and fossil Crinoidea. Bristol, Bristol and London