@conference{6741,
  author = {Manuel Güdel and Edward Guinan and S. Skinner},
  title = {The X-ray and radio sun in time: Coronal evolution of solar-type stars with different ages},
  year = {1998},
  url = {http://adsabs.harvard.edu/full/1998ASPC..154.1041G},
  note = {JILA Pub. 5958},
}