Solar Extreme Events 2007 International Symposium : Fundamental Science & Applied Aspects: Proceedings ; edited by Helen Mavromichalaki, Athanasios Papaioannou - Μαυρομιχαλάκη, Ελένη; Παπαίωάννου, Αθανάσιος (National and Kapodistrian University of Athens, 2007)