@article{Briquet:1970,
      author        = "Briquet, M. and  Aerts, C. and  Lüftinger, T. and  De
                       Cat, P. and  Piskunov, N. E. and  Scuflaire, R.",
      title         = "{He and Si surface inhomogeneities of four Bp variable
                       stars}",
      year          = "2004",
}