Kosch, M. J., Rietveld, M. T., Kavanagh, A. J., Davis, C., Yeoman, T., Honary, F., et al. (2002). High-latitude pump-induced optical emissions for frequencies close to the third electron gyro-harmonic. Geophysical Research Letters, 29(23): 2112. doi:10.1029/2002GL015744.