BraviS., CappellettiP., RispoliC. and LorussoM. (2023) “Nodules and chert layers in the Ichtyolitic Limestones Formation of Civita of Pietraroja (Southern Apennines, Italy). A genetical model”, Bulletin of Regional Natural History, 3(1), pp. 1-17. doi: 10.6093/2724-4393/9978.