author        = "Dolla, L. and Marqué, C. and Berghmans, D. and Cabanas
                       Parada, C. and Dominique, M. and De Groof, A. and Seaton,
                       D.B. and Van Doorsseleare, T. and Verdini, A. and West, M.
                       and Zender, J. and Zhukov, A.N.",
      title         = "{Time delays in quasi-periodic pulsations observed during
                       the X2.2 solar flare on 2011 February 15}",
      year          = "2012",