Citation:
Ballard S, Fabrycky D, Fressin F, Charbonneau D, Desert J-M, Torres G, Marcy G, Burke CJ, Isaacson H, Henze C, et al. The Kepler-19 System: A Transiting 2.2 R $_\ensuremathøplus$ Planet and a Second Planet Detected via Transit Timing Variations}. \apj. 2011;743 (2) :200.