@article{Millan:132143,
      author        = "Millan, A. and Urtizberea, A. and Silva, N. J. O. and
                       Palacio, F. and Amaral, V. S. and Snoeck, E. and Serin, V.",
      title         = "{Surface Effects in Maghemite Nanoparticles}",
      year          = "2007",
}