Mikuláš R. & Dronov, A. V. 2005.
Trace fossils.The Sixth Baltic Stratigraphical Conference. Cambrian and Ordovician of St. Petersburg Region, Guidebook for the pre-conference field trip. Dronov, A.V., Tolmacheva T., Raevskaya E. (Eds.), pp. 33-38.
Jensen, S. 1997.
Trace fossils from the Lower Cambrian Mickwitzia sandstone, south-central Sweden.Fossils and Strata42,