„Determination of process function for pitch diameter D2 in electro-erosion machining of threads from sintered metallic carbides type G20“. Annals of ”Dunarea de Jos” University of Galati, Fascicle V, Technologies in machine building, Bd. 27, November 2009, S. 233-8, https://ojs.ugal.ro/index.php/tmb/article/view/2008.