noise and other systematic effects in the Planck-LFI radiometersM. Seiffert, A. Mennella, C. Burigana, N. Mandolesi, M. Bersanelli, P. Meinhold and P. LubinA&A, 391 3 (2002) 1185-1197DOI: https://doi.org/10.1051/0004-6361:20020880