1. BOHX , E. T. , 1963 ,The Transform, Analysis of Linear Systems( Reading , Mass . Addison Wesley Publishing Co. ), p. 281 .
2. BROWN , G. S. , and CAMPBELL , D. P. , 1948 ,Principles of Servomechanism(New York John Wiley and Sons) , p. 334 .
3. CAMPBELL , D. P. , 1958 ,Process Dynamics(New York John Wiley and Sons) ,p. 104
4. Approximation of Fractional Capacitors(1/s)^(1/n)by a Regular Newton Process