1. A. Bray, G. Barbato, R. Levi, Theory and Practice of Force Measurement, Academic Press, London, 1990, pp. 8–17.
2. G. Barbato, C.N.R. Turin, A. Bray, Sensors for measuring force, in: H.H. Bau, N.F. de Rooij, B. Kloeck (Eds.), Sensors — A Comprehensive Survey: Mechanical Sensors, Vol. 7, VCH, New York, 1994, pp. 437–482.
3. Design and fabrication of micro-electromechanical systems;Kota;J. Mech. Design, Trans. ASME,1994
4. Independent detection of vertical and lateral forces with a sidewall implanted dual-axis piezoresistive cantilever;Chui;Appl. Phys. Lett.,1998
5. Low-cost CMOS interface for capacitive sensors and its application in a capacitive angular encoder;Li;Analog Int. Circuits Signal Process.,1997