1. Akasofu, S. I., , Physics of Magnetospheric Substorms, D. Reidel, Hingham, Mass., 1977,
2. Geomagnetic variations with period from 13 to 30 years;Alldredge;J. Geomagn. Geoelectr.,1977
3. Dayside high latitude ionospheric current systems;Baumsohann,1984
4. Berthelier, A., , Etude des influences du vent solaire sur l'activite magnetique terrestre, particulibrement aux hautes latitudes, Doctorat d'Etat, Univ. Pierre et Marie Curie, Paris, 1977,
5. Chapman, S., , J., Bartels, , Geomagnetism, , 1, Oxford University Press, New York, 1940,