“Palynological Zonation and Palynofacies Investigation of the Fjerritslev Formation (Lower Jurassic - Basal Middle Jurassic) in the Danish Subbasin”. Danmarks Geologiske Undersøgelse Serie A 30 (December 31, 1991): 1–150. Accessed February 4, 2026. https://geusjournals.org/index.php/seriea/article/view/7050.