@article{Pfeffer:6896,
      author        = "Pfeffer, J. and Cazenave, A. and Rosat, S. and Mandea, M.
                       and Dehant, V. and Moreira, L. and Barnoud, A.  ",
      title         = "{Detections of a 6-year cycle in the Earth system.}",
      month         = "Apr",
      year          = "2023",
}