Меловой период

Wisshak, M., Titschack, J., Kahl, W.-A., Girod, P. (2017) Classical and new bioerosion trace fossils in Cretaceous belemnite guards characterised via micro-CT // Foss. Rec., Vol.20, P.173-199, https://doi.org/10.5194/fr-20-173-2017

https://www.foss-rec.net/20/173/2017/fr-20-173-2017.pdf