File:Cooksonia Pertoni.png
Sources:
- C. Kevin Boyce. "How green was Cooksonia? The importance of size in understanding the early evolution of physiology in the vascular plant lineage". Paleobiology, 34(2), 2008, pp. 179–194. DOI:[0179:HGWCTI2.0.CO;2 10.1666/0094-8373(2008)034[0179:HGWCTI]2.0.CO;2].
- Habgood, K.S.; Edwards, D.; Axe, L. (2002). "New perspectives on Cooksonia from the Lower Devonian of the Welsh Borderland". Botanical Journal of the Linnean Society 139 (4): 339-359. DOI:10.1046/j.1095-8339.2002.00073.x.
- D. Edwards (1980). "Records of Cooksonia-type sporangia from late Wenlock strata in Ireland". Nature 287: 41–42. DOI:10.1038/287041a0.