@article{Sergeev2013a, author = "E. Sergeev and S. Grach and A. Shindin and E. Mishin and P. Bernhardt and S. Briczinski and B. Isham and M. Broughton and J. LaBelle and B. Watkins", title = "Artificial Ionospheric Layers during Pump Frequency Stepping Near the 4th Gyroharmonic at HAARP", year = 2013 , journal = "Phys. Rev. Lett.", volume = 110, number = 6, keywords = "amisr, muir", doi = "10.1103/PhysRevLett.110.065002" } @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" }