Berger, S. & Kaever, M. J. 1992. Dasycladales. An Illustrated Monograph of a Fascinating Algal Order. Thieme Verlag, Stuttgart, 247 pp.
Bulman, O. M. B. 1955. Graptolithina with Sections on Enteropneusta and Pterobranchia. The Geological Society of America, Inc.; The University of Kansas, Boulder, Colorado and Lawrence, Kansas, 101 pp.
Bulman, O. M. B. 1970. Graptolithina with Sections on Enteropneusta and Pterobranchia. The Geological Society of America, Inc.; The University of Kansas; Boulder, Colorado and Lawrence, Kansas, 163 pp.
Cocks, L. R. M. & Torsvik, T. H. 2005. Baltica from the late Precambrian to mid-Palaeozoic times: the gain and loss of a terrane’s identity. Earth-Science Reviews, 72, 39–66.
doi:10.1016/j.earscirev.2005.04.001
Elliott, G. F. 1971. A new fossil alga from the English Silurian. Palaeontology, 14, 637–641.
Foerste, A. F. 1923. Notes on Medinan, Niagaran, and Chester fossils. Denison University Bulletin, 20, 37–120.
Kenrick, P. & Vinther, J. 2006. Chaetocladus gracilis n. sp., a non-calcified Dasycladales from the Upper Silurian of Skåne, Sweden. Review of Palaeobotany and Palynology, 142, 153–160.
doi:10.1016/j.revpalbo.2006.03.023
LoDuca, S. 1990. Medusaegraptus mirabilis Ruedemann as a noncalcified dasyclad alga. Journal of Paleontology, 64, 469–474.
LoDuca, S. T. 1997. The green alga Chaetocladus (Dasycladales). Journal of Paleontology, 71, 940–949.
LoDuca, S. T. 1998. Noncalcified thallophytic algae in the fossil record. In Abstracts with Programs – Geological Society of America (Tetreault, D., ed.), p. 385. Geological Society of America (GSA), Boulder, CO.
LoDuca, S. T. 2001. A thallophytic-alga-dominated biota from the Silurian Eramosa Formation, Ontario, Canada. In Abstracts with Programs – Geological Society of America (Tetreault, D., ed.), p. 22. Geological Society of America (GSA), Boulder, CO.
LoDuca, S. T. & Brett, C. E. 1997. The Medusaegraptus epibole and lower Ludlovian Konservat-Lagerstätten of eastern North America. In Paleontological Events: Stratigraphic, Ecological, and Evolutionary Implications (Brett, C. E., ed.), pp. 369–405. Columbia University Press, New York.
LoDuca, S. T., Kluessendorf, J. & Mikulic, D. G. 2003. A new noncalcified dasycladalean alga from the Silurian of Wisconsin. Journal of Paleontology, 77, 1152–1158.
doi:10.1666/0022-3360(2003)077<1152:ANNDAF>2.0.CO;2
Mierzejewski, P. 1991. Estoniocaulis Obut et Rytzk, 1958 and Rhadinograptus Obut, 1960 are not graptolites. Acta Palaeontologica Polonica, 36, 77–81.
Nitecki, M. H. & Spjeldnaes, N. 1993. Silurian noncalcareous algae from Gotland. In Studies on Fossil Benthic Algae (Barattolo, F. & De Castro, P., eds), Bollettino della Societa Paleontologica Italiana: Modena, Mucci, Spec. vol. 1, 345–351.
Obut, A. M. 1960. Correlation of some parts of Estonian Ordovician and Silurian deposits according to graptolites. Eesti NSV Geoloogia Instituudi Uurimused, 5, 143–158 [in Russian].
Obut, A. M. & Rytzk, G. V. 1958. Ordovician and Silurian Dendroidea of Estonia. Eesti NSV Geoloogia Instituudi Uurimused, 3, 125–144 [in Russian].
Ruedemann, R. 1925. Some Silurian (Ontarian) faunas of New York. New York State Museum Bulletin, 265, 1–134.
Ruedemann, R. 1947 Graptolites of North America. Geological Society of America, Albany, 652 pp.