Optimized in-flight absolute calibration for extended CMB surveysB. Cappellini, D. Maino, G. Albetti, P. Platania, R. Paladini, A. Mennella and M. BersanelliA&A, 409 1 (2003) 375-385DOI: https://doi.org/10.1051/0004-6361:20030927