@article{Jimenez-Monferrer:2008ne,
  author = "Jimenez- Monferrer, Sergio  and  Marcaide, J. M.  and  Guirado, J. C.  and  Marti-Vidal, Ivan",
  title = "{High-precision astrometry of the S5 polar-cap radio sources: Measurements of the frequency dependence of the VLBI cores}",
  doi = "10.22323/1.052.0103",
  journal = "PoS",
  year = 2008,
  volume = "MRU",
  pages = "103"
}