author        = "Poutanen, M.  and Altamimi, Z.  and Brockmann, E. and
                       Bruyninx, C. and Caporali, A. and Dach, R. and Dousa, J.
                       and Fernandes, R. and Kenyeres, A. and Legrand, J. and
                       Lidberg, M. and Liwosz, T. and Pacione, R. and Sacher, M.
                       and Söhne, W.  and Torres, J. and Völksen, C.",
      title         = "{Present and future of European reference frames }",
      month         = "Apr",
      year          = "2019",