1. The regular geomagnetic field variations during quiet solar conditions;Campbell,1989
2. An investigation of the equatorial electrojet by means of ground-based magnetic measurements in Brazil;Hesse;Ann. Geophys.,1982
3. Solar quiet and lunar daily variation fields;Matsushita,1967
4. Sq and L current systems in the ionosphere;Matsushita;Geophys. J. R. Astr. Soc.,1968
5. Geomagnetically quiet day ionospheric currents over the Indian sector-11 Equatorial electrojet currents;Oko;Journal of Atmospheric and Terrestrial Physics,1996