J.W.M. Jagt, R.H.B. Fraaije, and B.W.M. van Bakel. “A Late Miocene Astropectinid (Echinodermata, Asteroidea) and Associated Ichnofossils from Liessel, Province of Noord-Brabant, the Netherlands”. Netherlands Journal of Geosciences 88 (September 1, 2009): 127 - 131. Accessed March 26, 2026. https://njgjournal.nl/index.php/njg/article/view/11979.