1. Zuhair D. Shebeeb, Slip Power Recovery Induction Motor Drive System, Ph.D. Thesis in the Electrical and Electronics Engineering Department, University of Technology, 1998.
2. Hilmi F. Ameen, High Chopper Frequency for WRIM with Resistively Load Rotor Chopper, ASTF-SRO4 Conference, Damascus, Syria, 2005.
3. Rotor chopper control for induction drive: TRC strategy;Sen;IEEE Trans. on Ind. Appl.,1975
4. Chopper controlled slip ring induction motor;Wani;IEEE Trans. on IECI,1977
5. induction motors for crane applications;Crowder;IEE Jour. of Electric power Applications,1979