Drăgan, N. (2012) Considerations on the nonlinearity grade of the nonlinear mechanical elastic systems, Analele Universităţii "Dunărea de Jos" din Galaţi. Fascicula XIV, Inginerie mecanică = Annals of “Dunarea de Jos“ University of Galati. Fascicle XIV, Mechanical Engineering, 19(1), S. 13-18. Verfügbar unter: https://www.gup.ugal.ro/ugaljournals/index.php/im/article/view/3680 (Zugegriffen: 27September2025).