Morkvenaite-Vilkonciene, I., D. Virzonis, G. Vanagas, and V. Krikscikas. “Operating Point of Capacitive Micromachined Ultrasonic Transducers With Sub-Structural Elements”. Elektronika Ir Elektrotechnika, vol. 18, no. 9, Nov. 2012, pp. 43-46, doi:10.5755/j01.eee.18.9.2804.