1. The Wolverine Petrified Forest, Utah;Ash;Geol. Surv. Notes,2003
2. Palaeobotanical systematics fort he phylogenetic age: applying organ-species, form-species and phylogenetic species concepts in a framework of reconstructed fossil and extant whole-plants;Bateman;Taxon,2009
3. Booi, M., 2010. Late Palaeozoic araucarioid fossil wood from Sumatra, Indonesia: a quantitative approach to an ever growing problem. 8th European Palaeobotanical and Palynological Conference (Budapest, 6–10 July 2010) abstract volume, 64 p.
4. Einige fossile Hölzer Preussens nebst kritischen Bemerkungen über die Anatomie des Holzes und die Bezeichnung fossiler Hölzer, Schrif. physik.-ökon;Caspary;Gesell. Königsberg,1887
5. Gymnospermous wood from the Kimmeridgian of East Sutherland and from Sandringham Sands of Norfolk;Creber;Palaeontology,1972