Šimo, Vladimír, and Dušan Starek. “Analysis of the Trace Fossil Finds from Paleogene Formations of the Central Western Carpathian (Orava region)”.
Geology, Geophysics and Environment, vol. 42, no. 1, July 2016, p. 126,
https://doi.org/10.7494/geol.2016.42.1.126.