Draudviliene, L., and L. Mazeika. “Investigation of the Spectrum Decomposition Technique for Group Velocity Measurement of Lamb Waves Propagating in CFRP Composite Plate”. Elektronika ir Elektrotechnika 19, no. 2 (February 7, 2013): 57-60. Accessed July 9, 2020. http://eejournal.ktu.lt/index.php/elt/article/view/3470.