@article{DeBecker:2058,
      author        = "De Becker, M. and  Rauw, G. and  Blomme, R. and  Pittard,
                       J. M. and  Stevens, I. R. and  Runacres, M. C.",
      title         = "{An XMM-Newton observation of the multiple system HD
                       167971 (O5-8V + O5-8V + (O8I)) and the young open cluster
                       NGC 6604}",
      year          = "2005",
}