1. Bai, J., Fan, Y., Li, X., andLi, X. (1999): ‘Tracing echo segment selection method for strain reconstruction’,Ultrasonics,37, pp. 51–57
2. Céspedes, I., Ophir, J., Ponnekanti, H., andMaklad, N. (1993): ‘Elastography: elasticity imaging using ultrasound with application to muscle and breast in-vivo’,Ultrasound Imaging,15, pp. 73–88
3. Daly, C. H., andWheeler, III, J. B. (1971): ‘The use of ultra-sonic thickness measurement in the clinical evaluation of the oral soft tissues’,J. Int. Dent.,21, pp. 418–429
4. Dikstein, S., andHartzshtark, A. (1981): ‘In vivo measurement of some elastic properties of human skin’ inMarks, R., andPayne, P. A. (Eds.). ‘Bioengineering and skin’ (MTP Press, Lancaster) pp. 45–53
5. Ferguson-Pell, M., Hagisawa, S., andMasiello, R. D. (1994): ‘A skin indentation system using a pneumatic bellows’,J. Rehab. Res. Dev.,31, pp. 15–19