1. UN. Convention on Biological Diversity. 1992.
2. A mid-term analysis of progress toward international biodiversity targets
3. Bakkes, J.; Bolt, K.; Braeuer, I.; ten Brink, B.; Chiabai, A.; Ding, H.; Gerdes, H.; Jeuken, M.; Kettunen, M.; Kirchholtes, U.; Klok, C.; Markandya, A.; Nunes, P.; van Oorschot, M.; Peralta-Bezerra, N.; Rayment, M.; Travisi, C.; Walpole, M. The Cost of Policy Inaction - The Case of Not Meeting the 2010 Biodiversity Target, A study for the European Comission, DG Environment 2007/S 95–116033; Braat, L., ten Brink, P., Series Eds.; Wageningen/Brussels, 2008.