(en) Ward LF (1894) Recent Discoveries of Cycadean Trunks in the Potomac Formation of Maryland Bulletin of the Torrey Botanical Club, Vol. 21, No. 7 (Jul. 20, 1894), p.291-299DOI10.2307/2477918
(en) T. R. Lipka, S.G. Lucas (éditeur), J.I. Kirkland (éditeur) et J.W. Estep (éditeur), Lower and Middle Cretaceous Terrestrial Ecosystems, Albuquerque, New Mexico Museum of Natural History and Science, (OCLC40283894), «The Affinities of the Enigmatic Theropods of the Arundel Clay Facies (Aptian), Potomac Formation, Atlantic Coastal Plain of Maryland», p.229–234