* {{citecitar web|title título= How Does Arctic Sea Ice Form and Decay?|work obra= NOAA Arctic theme page|url = http://www.arctic.noaa.gov/essay_wadhams.html|accessdate acessodata=25 de abril de 2005 |ref={{harvid|NOAA Sea Ice essay}}}}
*{{citecitar web|titletítulo=All About Sea Ice |publisherpublicado=National Snow and Ice Data Center, University of Colorado, Boulder |url=http://nsidc.org/cryosphere/seaice/ |ref={{harvid|NSIDC All About Sea Ice}}}}