@article{Nazé:2206,
      author        = "Nazé, Y. and Mahy, L. and Damerdji, Y. and Kobulnicky, H.
                       A. and Pittard, J. M. and Parkin, E. R. and Absil, O. and
                       Blomme, R.",
      title         = "{The 2.35 year itch of Cygnus OB2 #9. I. Optical and X-ray
                       monitoring}",
      year          = "2012",
}