Picu, L. A Study of the Vibrations Transmitted to the Staff by the Atructures of the River Ships on the Romanian Danube Segment. Analele Universităţii "Dunărea de Jos" din Galaţi. Fascicula XIV, Inginerie mecanică = Annals of “Dunarea de Jos“ University of Galati. Fascicle XIV, Mechanical Engineering 2017, 24, 11-16.