M. Bitterly

Local time dependence of the dominant frequency of Pi2 pulsations at mid- and low-latitudes

M. Nosé, T. Iyemori, K. Kosaka, 2002 .

A multipoint determination of the propagation velocity of a sudden commencement across the polar ionosphere

H. Lühr, A. Weatherwax, L. Lanzerotti, 1999 .