1. Agência Portuguesa do Ambiente (2010) Atlas do Ambiente, Lisboa. http://www2.apambiente.pt/atlas/est/index.jsp . Accessed 14 Oct 2010
2. Andresen T, Gonçalves A, Santiago A, Séneca A, Soares C, Vieira C, Almeida D, Silva E, Caldas FB, Hespanol H, Bento J, Honrado J, Torres J, Gonçalves JA, Brito JC, de Carvalho LG, Pereira MJA, Curado MJ, Afonso M, Ferrand de Almeida N, Alexandrino P, Alves P, Marques PF, Silva V (2004) Estrutura Ecológica da Área Metropolitana do Porto, Porto
3. Angold PG, Sadler JP, Hill MO, Pullin A, Rushton S, Austin K, Small E, Wood B, Wadsworth R, Sanderson R, Thompson K (2006) Biodiversity in urban habitat patches. Sci Total Environ 360:196–204
4. Barrett GW, Peles JD (1999) Small mammal ecology: a landscape perspective. In: Barrett GW, Peles JD (eds) Landscape ecology of small mammals. Springer, New York, pp 1–8
5. Bell KE, Donnelly MA (2006) Influence of forest fragmentation on community structure of frogs and lizards in northeastern Costa Rica. Conserv Biol 20:1750–1760