1. D. Berlincourt, D. Curran, and H. Jaffe, Physical Acoustics Vol. 1, Part 1 (Academic, New York, 1964), pp. 182–198.
2. Surface mount assembly of BGA and μBGA
3. T. Ikeda, Fundamentals of Piezoelectricity (Oxford University Press, Oxford, 1996), pp. 31–51.