@article{Oyama2006a,
  author = "S. Oyama and B. J. Watkins and F. T. Djuth and M. J. Kosch and P. A. Bernhardt and C. J. Heinselman",
  title = "Persistent enhancement of the HF pump-induced plasma line measured with a UHF diagnostic radar at HAARP",
  year =  2006 ,
  journal = "J. Geophys. Res.",
  volume = 111,
  keywords = "amisr, muir",
  doi = "10.1029/2005JA011363"
}