Muirhead PS, Vanderburg A, Shporer A, Becker J, Swift JJ, Lloyd JP, Fuller J, Zhao M, Hinkley S, Pineda JS, et al. Characterizing the Cool KOIs. V. KOI-256: A Mutually Eclipsing Post-common Envelope Binary. \apj. 2013;767 (2) :111.