@article{Lobel:2758,
      author        = "Lobel, A. and  de Jager, K. and  Nieuwenhuijzen, H.",
      title         = "{Long-term Spectroscopic Monitoring of Cool Hypergiants HR
                       8752, IRC+10420, and 6 Cas near the Yellow Evolutionary
                       Void}",
      year          = "2013",
}