Drăgan, N. Dynamic Analisys of the Parameters of the Mechanical Systems With Structural Damping. Viscoelastic Sls Model. Part 1: Amplitude Factor. Analele Universităţii "Dunărea de Jos" din Galaţi. Fascicula XIV, Inginerie mecanică = Annals of “Dunarea de Jos“ University of Galati. Fascicle XIV, Mechanical Engineering 2016, 23, 9-12.