www.volcan.ch
www.sveurop.org
volcano.und.nodak.edu
www.ct.ingv.it
www.thierrybasset.ch
islande2010.mbnet.fr/2010/04/leyjafjallajokul-pour-de-bon
www.boston.com/bigpicture/2010/04/icelands_disruptive_volcano.html
www.swisseduc.ch/stromboli