1. Cascading top - down effects of changing oceanic predator abundances;Baum;Journal of Animal Ecology,2009
2. Continuous Plankton Records: Plankton Atlas of the North Atlantic Ocean 1958-1999;Beaugrand;Marine Ecology Progress Series,2004
3. Blum , S. Vieglais , D. Schwartz , P.J. 2001 http://digir.sourceforge. net/events/20011106/DiGIR.ppt
4. NOAA Atlas NEDIS;Boyer,2006