Shear stresses in beams with variable cross section, subjected to non-uniform bending - Dumitrache, Petru (Analele Universităţii "Dunărea de Jos" din Galaţi. Fascicula XIV, Inginerie mecanică = Annals of “Dunarea de Jos“ University of Galati. Fascicle XIV, Mechanical Engineering, 2012)