Koppelhus, E.B. and Batten, D.J. 1992. Megaspore assemblages from the Jurassic and lowermost Cretaceous of Bornholm, Denmark. Danmarks Geologiske Undersøgelse Serie A. 32, (Dec. 1992), 1–81. DOI:https://doi.org/10.34194/seriea.v32.7052.