Stratospheric NO2 climatological trend at northern mid-latitudes from 8 years of ground based observations at Mt. Cimone Station. - Andrea Petritoli; Paolo Bonasoni; Ubaldo Bonafè; Daniele Bortoli; Francescopiero Calzolari; Franco Evangelisti; Ivan Kostadinov; Fabrizio Ravegnani; Giorgio Giovanelli (IGARSS, 2002)