• Study of various excitation and reference signals for pulsed correlation-based ultrasound signal processingMärtens, Olev; Saar, Tõnis; Reidla, MarkoElektronika ir elektrotechnika = Electronics and electrical engineering2010 / 9, lk. 89-92 : ill https://www.researchgate.net/publication/268043244_Study_of_Various_Excitation_and_Reference_Signals_for_Pulsed_Correlation-based_Ultrasound_Signal_Processing