1. CERPCH (National Center of Reference for Small Hydroelectric Plants), www.cerpch.unifei.edu.br.
2. IEA (International Energy Agency), www.iea.org.
3. Brazilian Government, www.brasil.gov.br.
4. ANEEL (Brazilian Electric Energy Agency), www.aneel.gov.br.
5. Kalff, J. Limnology. Prentice Hall, 2002.