The HARPS search for southern extra-solar planets - XXII. Multiple planet systems from the HARPS volume limited sampleG. Lo Curto, M. Mayor, W. Benz, F. Bouchy, C. Lovis, C. Moutou, D. Naef, F. Pepe, D. Queloz, N. C. Santos, D. Segransan and S. UdryA&A, 512 (2010) A48DOI: https://doi.org/10.1051/0004-6361/200913523
