N. Hauk, “Some aspects regarding the working periods ofmechanical systems drivenwith hydraulic feedback”, Analele Universităţii "Dunărea de Jos" din Galaţi. Fascicula XIV, Inginerie mecanică = Annals of “Dunarea de Jos“ University of Galati. Fascicle XIV, Mechanical Engineering, vol. 21, no. 2, pp. 27-30, Oct. 2014.