1. The Northern Lights: Secrets of the Aurora Borealis;Akasofu,2009
2. Sunspot positions and sizes for 1825-1867 from the observations by samuel heinrich schwabe;Arlt;Mon. Not. R. Astron. Soc.,2013
3. Overview of space weather, space weather forecasts, and system impacts during the high activity from 19 october through 7 2003;Balch,2004
4. The three-hour-range index measuring geomagnetic activity;Bartels;Terr. Magn. Atmos. Electr.,1939
5. An essay toward solving a problem in the doctrine of chances;Bayes;Philos. Trans. R. Soc. Lond.,1764