G. Naidin, Structural and kinematic analysis of planetary gearings, Analele Universităţii "Dunărea de Jos" din Galaţi. Fascicula XIV, Inginerie mecanică = Annals of “Dunarea de Jos“ University of Galati. Fascicle XIV, Mechanical Engineering, vol. 18, nᵒ 1, p. 69-72, juin 2011.