• Some method of signal processing and beamforming in hydrographic applicationsRuuben, Toomas; DerkatÅ¡, JuliaElektronika ir elektrotechnika = Electronics and electrical engineering2008 / 6, p. 27-32 : ill https://www.researchgate.net/publication/228346328_Some_Methods_of_Signal_Processing_and_Beamforming_in_Hydrographic_Applications