[1] Wikipedia, Biosensor.
[2] Rodriguez-Mozaz, S., Marco, M., de Alda, M. L., & Barceló, D:"Biosensors for environmental applications: Future development trends", Pure and Applied Chemistry, 76(4):723-752, 2004.
[3] Oil in the Sea, Ocean Studies Board and Marine Board of the National Academy of Sciences (2003)
[4] Scientific American 303, 16-18 doi:10.1038/scientificamerican0710-16; July 2010.
[5] National Oceanic and Atmospheric Administration (2010, June 29). NOAA- supported scientists predict 'larger than average' Gulf dead zone. ScienceDaily. Retrieved July 5, 2010, from http://www.sciencedaily.com/releases/2010/06/100629122948.htm
[6] Johnson, J., & Torrice, M. (2010, June 14). BP's Ever-Growing Oil Spill | Cover Story | Chemical & Engineering News. C & EN: Chemical & Engineering News. Retrieved July 6, 2010, from http://pubs.acs.org/cen/coverstory/88/8824cover.html