1. Optimum settings for automatic controllers;Ziegler;J Dyn Syst Meas Control,1993
2. PID control: new identification and design methods;Johnson,2005
3. Structure and synthesis of PID controllers;Datta,2000
4. Dorcak L. Numerical models for simulation the fractional-order control system. UEF SAV, The Academy of Science Institute of Experimental Physics, Kosice, Slovak Republic; 1994.
5. Oustaloup A. La Drivation non Entire. Paris: HERMES, 1995.