1. Baillie JEM, Butcher ER (2012) Priceless or worthless? The world’s most threatened species. Zoological Society of London
2. Borgen L (1979) Karyologie of the Canarian Flora. In: Bramwell D (ed) Plants and Islands. Academic, London, pp 329–346
3. Burnett K, Kaiser B, Pitafi BA, Roumasset J (2006) Prevention, eradication, and containment of invasive species: illustrations from Hawaii. Agric Resour Econ Rev 35(1):63–77
4. Cardoso P, Barton P, Birkhofer K, Chichorro F, Deacon C, Fartmann T, Fukushima C, Gaigher R, Habel JC, Hallmann C, Hill M, Hochkirch A, Kwak M, Mammola S, Noriega JA, Orfinger A, Pedraza F, Pryke J, Roque F, Settele J, Simaika J, Stork N, Suhling F, Vorster C, Samways M (2020) Scientists’ warning to humanity on insect extinctions. Biol Conserv 242:1–12. https://doi.org/10.1016/j.biocon.2020.108426
5. Castroviejo S, Aedo C, Benedi C, Lainz M, Munoz Garmendia F, Nieto Feliner G, Paiva J (eds) (1997) Flora Iberica VIII: Haloragaceae-Euphorbiaceae. Real Jardín Botánico, CSIC, Madrid