Reference
Volker Dietze, Stefan Gräbenstein, Matthias Franz, Günter Schweigert, A. Wetzel (2021): The Middle Jurassic Opalinuston Formation (Aalenian, Opalinum Zone) at its type locality near Bad Boll and adjacent outcrops (Swabian Alb, SW Germany) – Palaeodiversity – 14: 15 - 113.