Arctic stratospheric HNO₃ and ClONO₂ profiles from MIPAS-B limb emission spectra during EASOE 1992 - Clarmann, T. von; Fischer, H.; Friedl-Vallon, F.; Linden, A.; Oelhaf, H.; Piesch, C.; Seefeldner, M.; Voelker, W. (1999)