Pappalardo G, Mona L, D'amico G, Wandinger U, Adam M, Amodeo A, Ansmann A, Apituley A, Alados Arboledas L, Balis D. Four-dimensional distribution of the 2010 Eyjafjallajökull volcanic cloud over Europe observed by EARLINET. Atmospheric Chemistry and Physics. 2013;13(8):4429-4450.