Optimized in-flight absolute calibration for extended CMB surveys B. Cappellini, D. Maino, G. Albetti, P. Platania, R. Paladini, A. Mennella and M. Bersanelli A&A, 409 1 (2003) 375-385 Published online: 17 November 2003 DOI: 10.1051/0004-6361:20030927