1. Adar, Korwa G., Nicasius A. Check. 2011. Comparative Diplomacy, Regional Stability and National Interest: The Nile River and the Riparian States. Pretoria: Africa Institute of South Africa;
2. Berber, Fritz. 1955. Die Rechtsquellen des internationalen Wassernutzungsrechts. Munich: R. Oldenbourg;
3. Blutman, László. 2010. In the Trap of a Legal Metaphor. International and Comparative Law Quarterly 59(3): 605-624;
4. Brunnée, Jutta, Stephen J. Toope, 1994. Environmental Security and Freshwater Resources: A Case for International Ecosystem Law. Yearbook of International Environmental Law 5: 41-76;
5. Caflisch, Lucius. 1989. Règles générales du droit des cours d'eau internationaux, The Hague: Recueil des Cours;