I.M. van Waveren, O.A. Abbink, T.B. van Hoof, and J.H.A. van Konijnenburg - van Cittert. “Revision of the Late Carboniferous Megaflora from the De Lutte-06 Well (Twente, the Netherlands), and Its Stratigraphical Implications”. Netherlands Journal of Geosciences 87 (December 1, 2008): 339 - 352. Accessed March 26, 2026. https://njgjournal.nl/index.php/njg/article/view/11928.