%0 Journal Article %A F. Roelofs %A M. D. Johnson %A H. Shiokawa %A S. S. Doeleman %A H. Falcke %B ApJ %D 2017 %G eng %N 1 %P 19 %T Quantifying Intrinsic Variability of Sagittarius A* Using Closure Phase Measurements of the Event Horizon Telescope %V 847