Rumbutis, Laurynas, et al. “Research on the Mechanical Properties of the Weld Seams of Constructional Steel Using Vibration Energy Method During Welding”. Mokslas – Lietuvos Ateitis Science – Future of Lithuania, vol. 2, no. 4, Aug. 2010, pp. 73-76, https://doi.org/10.3846/mla.2010.075.