« The parametrical free vibrations of elastic systems. the analytical exact solutions ». Analele Universităţii "Dunărea de Jos" din Galaţi. Fascicula XIV, Inginerie mecanică = Annals of “Dunarea de Jos“ University of Galati. Fascicle XIV, Mechanical Engineering 19, no. 1 (juin 1, 2012): 55–58. Consulté le novembre 2, 2026. https://ojs.ugal.ro/index.php/im/article/view/3694.