Sparse point-source removal for full-sky CMB experiments: application to WMAP 9-year data F. C. Sureau, J.-L. Starck, J. Bobin, P. Paykari and A. Rassat A&A, 566 (2014) A100 Published online: 23 June 2014 DOI: 10.1051/0004-6361/201322706