1. Solar-induced currents in power systems: causes and effects;Albertson;IEEE Trans. Power Appar. Syst.,1973
2. Solar and Geomagnetic Activity;Allen;NOAA Letters, 13 March, 28 March, 30 April, 1989,1989
3. Outage of the L4 System and the geomagnetic disturbances of 4 August 1972;Anderson;The Bell Syst. Tech. J.,1974
4. The effect of Earth's magnetism on submarine cables;Axe;Post Off. Electr. Eng. J.,1967
5. A reporter at large: A subtle storm;Brooks;New Yorker Magazine,1959