Kustatscher, E.; Wachtler, M.; Van Konijnenburg-Van Cittert, J. H. A. (2007). Horsetails, ferns and seeferns from the Middle Triassic (Anisian) locality Kühwiesenkopf (Monte Pra della Vacca) in the Dolomites (Northern Italy). Palaeontology. 50(5): 1277-1298.