http://home.clara.net/darvill/altenerg/wave.htm

http://home.clara.net/darvill/altenerg/tidal.htm

http://en.wikipedia.org/wiki/Wave_power

http://www.energy.ca.gov/development/oceanenergy/index.html

http://ocsenergy.anl.gov/guide/wave/index.cfm

http://www.eia.doe.gov/kids/energyfacts/sources/renewable/ocean.html

http://inventors.about.com/od/tstartinventions/a/tidal_power.htm