E. Roșu, M. Culea, T. Dumitriu, and T. Munteanu, “Indirect control of a single-phase active power filter”, The Annals of “Dunarea de Jos“ University of Galati. Fascicle III, Electrotechnics, Electronics, Automatic Control, Informatics, vol. 29, pp. 94-99, Dec. 2006.