García Criado, M., Väre, H., Nieto, A., Elias, R.B., Dyer, R., Ivanenko, Y., Ivanova, D., Lansdown, R., Molina, J.A., Rouhan, G., Rumsey, F., Troia, A., Vrba, J. and Christenhusz, M.J.M. (2017) European Red List of Lycopods and Ferns. IUCN, Brussels, Belgium, 59 pp.