Gravesen, P., F. Rolle, and F. Surlyk. “Lithostratigraphy and Sedimentary Evolution of the Triassic, Jurassic and Lower Cretaceous of Bornholm, Denmark”. Danmarks Geologiske Undersøgelse Serie B, vol. 7, Apr. 1982, pp. 1-51, doi:10.34194/serieb.v7.7062.