Masanobu Yamamoto, Kath Ficken, Marianne Baas, Hendrik-Jan Bosch and Jan W. de Leeuw (1996) “Molecular palaeontology of the earliest Danian at Geulhemmerberg (the Netherlands)”, Netherlands Journal of Geosciences, 75, pp. 255-267. Available at: https://njgjournal.nl/index.php/njg/article/view/12377 (Accessed: 31March2026).