@article{Zurutuza:4739,
      author        = "Zurutuza, J.  and Kenyeres, A. and Legrand, J.",
      title         = "{Combining IGb08 and IGS14 normal equations: Impact on the
                       cumulative time series caused by the switch from igs08.atx
                       to igs14.atx}",
      month         = "May",
      year          = "2019",
}