Kipping D M, Hartman J, Bakos GÁ, Torres G, Latham D W, Bayliss D, Kiss L L, Sato B, Béky B, Kovács G, et al. HAT-P-31b,c: A Transiting, Eccentric, Hot Jupiter and a Long-period, Massive Third Body. \aj. 2011;142 (3) :95.