@article{Coffey:96210,
      author        = "Coffey, David and De La Fuente, César and Ciria, Miguel
                       and Serrate, David and Loth, Sebastian and Arnaudas, José
                       Ignacio",
      title         = "{Mixed 4f population of Tm adatoms on insulating Cu2N
                       islands}",
      year          = "2020",
}