The mass of planet GJ 676A b from ground-based astrometry - A planetary system with two mature gas giants suitable for direct imaging
J. Sahlmann, P. F. Lazorenko, D. Ségransan, N. Astudillo-Defru, X. Bonfils, X. Delfosse, T. Forveille, J. Hagelberg, G. Lo Curto, F. Pepe, D. Queloz, S. Udry and N. T. Zimmerman
