1. Barry TN, McNabb WC (1999) The implications of condensed tannins on the nutritive value of temperate forages fed to ruminants. Brit J Nutr 81(4):263–272
2. Bland F, Auclair D (1999) Silvopastoral aspects of Mediterranean forest management. In: Etienne M (ed) Western European silvopastoral systems. INRA, Montpellier, France
3. Bunce RGH, Pérez-Soba M, Elbersen BS, Van Wingerden WKRE (2005) An assessment of the role of grazing in European habitats. In: Mosquera-Losada MR, McAdam J, Rigueiro-Rodríguez A (eds.) Silvopastoralism and sustainable land management. CABI, Wallingford, UK
4. Burgess PJ (1999) Effects of agroforestry on farm biodiversity in the UK. Scottish Forestry 53(1):24–27
5. Campos P, Daly-Hassen H, Ovando P, Chebil A, Oviedo JL (2008) Economics of multiple use cork oak woodlands: two case studies of agroforestry systems In: Rigueiro-Rodríguez A, McAdam J, Mosquera-Losada MR (eds.) Agroforestry in Europe, vol 6. Springer, Dordrecht, The Netherlands