Halfar, Jochen, and Rodney M. Fujita. 2007. "Danger of Deep-Sea Mining." Science 316, no. 5827: 987. Academic Search Complete, EBSCOhost (Consultado el 19 de enero de 2010)
<http://www.sciencemag.org/cgi/content/full/316/5827/987>
Halfar, Jochen, y Rodney M. Fujita. 2007. "Danger of Deep-Sea Mining." Science 316, no. 5827: 987. Academic Search Complete, EBSCOhost (acceso: 19 de enero de 2010)
<http://www.sciencemag.org/cgi/content/full/316/5827/987>