Transit Timing Observations from Kepler: VI. Potentially interesting   candidate systems from Fourier-based statistical tests
  We analyze the deviations of transit times from a linear ephemeris for the Kepler Objects of Interest (KOI) through Quarter six (Q6) of science data. We conduct two statistical tests for all KOIs and a related statistical test for all pairs of KOIs in multi-transiting systems. These tests identify several systems which show potentially interesting transit timing variations (TTVs). Strong TTV systems have been valuable for the confirmation of planets and their mass measurements. Many of the systems identified in this study should prove fruitful for detailed TTV studies. 
Jason H. Steffen (1), Eric B. Ford (2), Jason F. Rowe (8,9), Daniel C.   Fabrycky (3,4), Matthew J. Holman (5), William F. W...
astro-ph.EP