Dragomirescu, Cristian, und Andrei Craifaleanu. Non-Linear Dynamic Behavior of a Ball Float Valve. 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. 2 (November 15, 2012): 17-22. Zugegriffen April 21, 2026. https://www.gup.ugal.ro/ugaljournals/index.php/im/article/view/3721.