Multirate output feedback sliding mode control of permanent magnet stepper motor using flatness property. - Bijnan Bandyopadhyay; Vishvjit Kashyapray Thakar (CCA, 2004)

Discrete time output feedback sliding mode control for nonlinear MIMO system: a stepper motor case. - Bijnan Bandyopadhyay; Vishvjit Kashyapray Thakar (Int. J. Syst. Sci., 2008)