Nastac, Silviu. “On Behaviour Evaluation of Vibratory Systems With Uncertain Parameters”. Analele Universităţii "Dunărea de Jos" din Galaţi. Fascicula XIV, Inginerie mecanică = Annals of “Dunarea de Jos“ University of Galati. Fascicle XIV, Mechanical Engineering 25, no. 2 (November 15, 2018): 43-46. Accessed September 26, 2021. https://www.gup.ugal.ro/ugaljournals/index.php/im/article/view/3956.