On the kinematic age of brown dwarfs: radial velocities and space motions of 43 nearby L dwarfs A. Seifahrt, A. Reiners, K. A. M. Almaghrbi and G. Basri A&A, 512 (2010) A37 Published online: 25 March 2010 DOI: 10.1051/0004-6361/200913368