The HARPS search for southern extra-solar planets - XVII. Super-Earth and Neptune-mass planets in multiple planet systems HD 47 186 and HD 181 433F. Bouchy, M. Mayor, C. Lovis, S. Udry, W. Benz, J.-L. Bertaux, X. Delfosse, C. Mordasini, F. Pepe, D. Queloz and D. SegransanA&A, 496 2 (2009) 527-531DOI: https://doi.org/10.1051/0004-6361:200810669