Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsPoles and Zeros of Time-Domain Response Functionshttp://demonstrations.wolfram.com/PolesAndZerosOfTimeDomainResponseFunctions/]]>http://demonstrations.wolfram.com/PolesAndZerosOfTimeDomainResponseFunctions/