1.
A.A. Klompmaker, B.J.H.M. van den Berkmortel. Earliest Jurassic (Hettangian) psiloceratoid ammonites from a subrosion pipe at Winterswijk, the eastern Netherlands. njg [Internet]. 2007Dec.1 [cited 2026Apr.2];86:379 - 388. Available from: https://njgjournal.nl/index.php/njg/article/view/11884