Ruuben, T., and J. Derkats. “Some Methods of Signal Processing and Beamforming in Hydrographic Applications”. Elektronika ir Elektrotechnika 86, no. 6 (July 22, 2008): 27-32. Accessed March 29, 2024. https://eejournal.ktu.lt/index.php/elt/article/view/11178.