1. Almeida JD, Freitas H (2000) A Flora Exótica e Invasora de Portugal. Portugaliae Acta Biologica 19:159–176
2. Almeida JD, Freitas H (2012) Exotic flora of continental Portugal – a new assessment. Bocconea 24:231–237
3. Bednar-Friedl B, Buijs A, Dobrovodskà M, Dumortier M, Eberhard K, Fischer A, Geamana N, Grunberger S, Langers F, Mauz I, Musceleanu O, Trátrai I, Young J (2009) Public perceptions of biodiversity change – results from a (pilot) survey in 8 European countries, in: A Long-Term Biodiversity, Ecosystem and Awareness Research Network, Project nº GOCE-CT-2003-505298, AlterNet, pp. 47
4. Botanical Garden of the University of Coimbra (2013) Azevinho: há séculos a ornamentar o Natal! Diário de Coimbra, 13 December, pp 9
5. Bremner A, Park K (2007) Public attitudes to the management of invasive non-native species in Scotland. Biol Conserv 139:306–314. DOI:https://doi.org/10.1016/j.biocon.2007.07.005