Researches on the acoustic treatments with composite materials panels at the frontal loader MMT45 - Drăgan, Nicușor (Analele Universităţii "Dunărea de Jos" din Galaţi. Fascicula XIV, Inginerie mecanică = Annals of “Dunarea de Jos“ University of Galati. Fascicle XIV, Mechanical Engineering, 2012)