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