@article{Gonzalez-Galan:2011q6,
  author = "Gonzalez-Galan, Ana  and  Kuulkers, Erik  and  Kretschmar, Peter  and  Larsson, Stefan  and  Postnov, Konstantin  and  Kochetkova, Al. Yu.  and  Finger, Mark H.",
  title = "{Spin period evolution of GX 1+4}",
  doi = "10.22323/1.115.0016",
  journal = "PoS",
  year = 2011,
  volume = "INTEGRAL 2010",
  pages = "016"
}