@article{Goryaev:3529,
      author        = "Goryaev, Farid F.  and Slemzin, Vladimir A.  and Rodkin,
                       Denis G.  and D'Huys, Elke  and Podladchikova, O. and West,
                       Matthew J. ",
      title         = "{Brightening and Darkening of the Extended Solar Corona
                       during the Superflares of September 2017}",
      year          = "2018",
}