Levitskii, R. R., Vdovych, A. S., Moina, A. P., & Zachek, I. R. (2015). Piezoelectric Resonance in KH2PO4 Type Crystals Revisited. Physics and Chemistry of Solid State, 16(3), 464–468. https://doi.org/10.15330/pcss.16.3.464-468