@article{Hudec:2009BS,
  author = "Hudec, René",
  title = "{Very long term observations of blazars candidates for supermassive black hole binaries}",
  doi = "10.22323/1.063.0076",
  journal = "PoS",
  year = 2009,
  volume = "BLAZARS2008",
  pages = "076"
}