PDF) Bilz, M., Kell, S.P., Maxted, N. and Lansdown, R.V. 2011 European Red List of Vascular Plants. Publications Office of the European Union, Luxembourg
PDF) Bilz, M., Kell, S.P., Maxted, N. and Lansdown, R.V. 2011 European Red List of Vascular Plants. Publications Office of the European Union, Luxembourg