Skovbjerg Rasmussen, E., T. Utescher, and K. Dybkjær. “Drowning of the Miocene Billund Delta, Jylland: Land–sea Fluctuations During a Global Warming Event”. GEUS Bulletin, vol. 28, July 2013, pp. 9-12, doi:10.34194/geusb.v28.4708.