@Article{ Toledo-Redondo_Parrot_SALINAS:1-11,

author = { Sergio Toledo-Redondo and Michel Parrot and ALFONSO SALINAS EXTREMERA } ,

title = { Variation of the first cut-off frequency of the Earth-ionosphere waveguide observed by DEMETER },

journal = { Journal of Geophysical Research },

year = { 2012 },

volume = { 117 },

pages = { 1-11 },

}