Variable Stars
Links
The Minima of Algol
http://skyandtelescope.com/observing/objects/variablestars/article_108_1.asp
An article by Alan MacRobert from Sky and Telescope Magazine about the star Algol (Beta Persei) was the first eclipsing variable star ever discovered.
The Top Twelve Naked-Eye Variable Stars
http://skyandtelescope.com/observing/objects/variablestars/article_160_1.asp
An article by John Isles from Sky and Telescope Magazine.