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, vol. 19, no. 2, Feb. 2013, pp. 57-60, doi:10.5755/j01.eee.19.2.3470.