1. World Health Organization: Constitution of the World Health Organization, including amendments adopted up to 31/12/2000. 2001, WHO Basic Document: Geneva, 43
2. General Assembly of the United Nations: Universal declaration of human rights. New York. 1948
3. United Nations Economic and Social Council: International covenant on economic, social and cultural rights. Geneva. 1966
4. United Nations Economic and Social Council. Committee on Economic, Social and Cultural Rights: Substantive issues arising in the implementation of the international covenant on economic, social and cultural rights. Geneva. 2000
5. World Health Organization: The selection of essential medicines. Geneva. 2002