J. Schwan, J. van Loon, R. Steenbeek, & P. van der Gaauw. (1980). Intraformational clay diapirism and extrusion in Weichselian sediments at Ormehøj (Funen, Denmark). Netherlands Journal of Geosciences, 241-250. Retrieved from https://njgjournal.nl/index.php/njg/article/view/13795