Beyerlin, Ulrich Max Planck Institute for Comparative Public Law and International Law, Max Planck Society;
Beyerlin, U. (2003). Sustainable Use of Natural Resources – A Key to Combating Poverty. Beyond the 2002 Johannesburg World Summit: Perspectives on International Environmental Law, 417-437. Retrieved from http://www.zaoerv.de/63_2003/63_2003_2_a_417_438.pdf.