Schiøler, P., Andsbjerg, J., Clausen, O.R., Dam, G., Dybkjær, K., Hamberg, L., Heilmann-Clausen, C., Johannessen, E.P., Kristensen, L.E., Prince, I. and Rasmussen, J.A. 2007. Lithostratigraphy: Stronsay Group, the Horda Formation. GEUS Bulletin. 12, (Jun. 2007), 57–63. DOI:https://doi.org/10.34194/geusb.v12.4936.