The paper I'd like to suggest is "Mass function and orbital distributions of substellar companiions", by Mayor, Queloz, and Udry. It exists as a preprint, in postscript.
"Mass function and orbital distributions of substellar companions"
by M. Mayor, D. Queloz, S. Udry To appear in "Brown Dwarfs and Extra-solar Planets" Tenerife, 1997