1. F.S. FOSTER, and J.W. HUNT Transmission of ultrasound beams through human tissue–Focusing and attenuation studies. Ultrasound in Med. and Biol., Vol. 5, 257–269, 1979.
2. P.R. STEPANISHEN Wide bandwidth Acoustic near and far field transient from baffled pistons.IEEE, Ultrasonics Symposium Proceedings, 113–118, 1977.
3. D.E. ROBINSON, S. LEE, L. BESS Near field transient radiation patterns for circular pistons. IEEE Transactions on acoustics, speech and signal processing ASPP 22, N° 6, 395–403, 1974
4. D.R. DIETZ, S.J. NORTON and M. LINZER Wideband annular array response. IEEE Ultrasonics symposium proceedings, 206–211, 1978.
5. M. FINK and M.T.LARMANDE Wideband Fresnel focusing array response IEEE Ultrasonics Symposium Proceedings, 204–209, 1979.