@article{Alcolea:2009yl,
  author = "Alcolea, Javier",
  title = "{Scales and orders of magnitude in Astronomy}",
  doi = "10.22323/1.065.0001",
  journal = "PoS",
  year = 2009,
  volume = "2nd MCCT-SKADS",
  pages = "001"
}