“Ultrasonic Single Element and Sectorized Array Transducers With Omnidirectional 2D Field Distribution for Non-Contact Human-Machine Interface and Echo-Location”. Elektronika ir Elektrotechnika 23, no. 4 (July 31, 2017): 51–55. Accessed December 5, 2025. https://eejournal.ktu.lt/index.php/elt/article/view/18722.