Jarzebowicz, L., A. Opalinski, and M. Cisek. “Improving Control Dynamics of PMSM Drive by Estimating Zero-Delay Current Value”. Elektronika Ir Elektrotechnika, vol. 21, no. 2, Apr. 2015, pp. 20-23, doi:10.5755/j01.eee.21.2.11507.