« The approximate or exact analytical solutions for the differential equations which describe parametric free vibrations of mechanical systems ». Analele Universităţii "Dunărea de Jos" din Galaţi. Fascicula XIV, Inginerie mecanică = Annals of “Dunarea de Jos“ University of Galati. Fascicle XIV, Mechanical Engineering 20, no. 1 (juin 5, 2013): 65–68. Consulté le novembre 2, 2026. https://ojs.ugal.ro/index.php/im/article/view/3556.