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4. Chen, Y. (2008a). Impulse response invariant discretization of fractional order integrators/differentiators compute a discrete-time finite dimensional z transfer function to approximate sr with r a real number. Category: Filter Design and Analysis, MATLAB Central. http://www.mathworks.com/matlabcentral/fileexchange/loadFile.do objectId = 21342 objectType = FILE
5. Chen, Y. (2008b). Impulse response invariant discretization of fractional order low-pass filters discretize [1/(τs+1)]r with r a real number. Category: Filter Design and Analysis, MATLAB Central. http://www.mathworks.com/matlabcentral/fileexchange/loadFile.do objectId = 21365 objectType = FILE