S. Ivas, T. Dumitru, and A. Tătaru, “Finite-element modelling of heating processus by induction of ferro-magnetic materials”, The Annals of “Dunarea de Jos“ University of Galati. Fascicle III, Electrotechnics, Electronics, Automatic Control, Informatics, vol. 21, pp. 9-13, Dec. 1998.