author        = "Lampens, P. and Tkachenko, A. and Lehmann, H. and
                       Debosscher, J. and Aerts, C. and Beck, P. G. and Bloemen,
                       S. and Kochiashvili, N. and Derekas, A. and Smith, J. C.
                       and Tenenbaum, P. and Twicken, J. D.",
      title         = "{Low-frequency variations of unknown origin in the Kepler
                       δ Scuti star KIC 5988140 = HD 188774}",
      year          = "2013",