Preliminary results from aircraft and ground-based measuremnts in Greece
Theocharis P., C. Zerefos, A. Hofzumahaus, A. Bais, I. Ziomas, D. Balis, A. Papayannis, K. Kourtidi, E. Kosmidis, C. Repapis, Ι. Isaksen, A. Krauss, M. Blumthaler, P. Suppan, P. Fabian, J. Pommereau