Petersen, H. I. ., Nielsen, L. H. ., Koppelhus, E. B. . and Sørensen, H. S. . (2003) “Early and Middle Jurassic mires of Bornholm and the Fennoscandian Border Zone: a comparison of depositional environments and vegetation”, GEUS Bulletin. Copenhagen, Denmark, 1, pp. 631–656. doi: 10.34194/geusb.v1.4687.