S. Sakai

The Galactic Center: Improved Relative Astrometry for Velocities, Accelerations, and Orbits near the Supermassive Black Hole

Jessica R. Lu, A. M. Ghez, T. Do, 2019, The Astrophysical Journal.

Testing General Relativity with Stellar Orbits around the Supermassive Black Hole in Our Galactic Center.

Jessica R. Lu, A. M. Ghez, G. Witzel, 2017, Physical review letters.

Final Results from the Hubble Space Telescope Key Project to Measure the Hubble Constant

J. P. Huchra, G. D. Illingworth, J. A. Graham, 1998, astro-ph/9801080.