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 Stangl, G. and Torres, J. and Völksen,
      title         = "{Towards Next Generation Reference Frames in Europe}",
      year          = "2018",