@article{Serrano:60925,
      author        = "Serrano, J. and Bosak, A. and Arenal, R. and Krisch, M.
                       and Watanabe, K. and Taniguchi, T. and Kanda, H.",
      title         = "{Vibrational properties of hexagonal boron nitride by
                       Inelastic X-ray scattering and ab initio calculations}",
      year          = "2007",
}