Goanță, A. 2013. Considerations on 2D constraints for drawings made with existing design software. Analele Universităţii "Dunărea de Jos" din Galaţi. Fascicula XIV, Inginerie mecanică = Annals of “Dunarea de Jos“ University of Galati. Fascicle XIV, Mechanical Engineering. 20, 2 (Oct. 2013), 13-16.