Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsFortescue's Theorem for a Three-Phase Unbalanced Systemhttp://demonstrations.wolfram.com/FortescuesTheoremForAThreePhaseUnbalancedSystem/]]>http://demonstrations.wolfram.com/FortescuesTheoremForAThreePhaseUnbalancedSystem/