The influence of the hydraulic fluid compressibility on the kinematics of mechanism actuated with hydraulic cylinders - Hauk, Niculai (Analele Universităţii "Dunărea de Jos" din Galaţi. Fascicula XIV, Inginerie mecanică = Annals of “Dunarea de Jos“ University of Galati. Fascicle XIV, Mechanical Engineering, 2015)