1.
Solar System Ionospheres
by Witasse, O
Space science reviews, 2008-07-19, Vol.139 (1-4), p.235-265

2.
Observation of electron and ion fluxes in the vicinity of Mars with the HARP spectrometer
by Shutte, N. M
Nature (London), 1989-10-19, Vol.341 (6243), p.614-616
