TY  - RPRT
TI  - Parametric vs nonparametric measurements in tissues with nonlinear frequency dependent attenuation.
AU  - J Ophir
DO  - 10.1016/0301-5629(84)90230-8
UR  - https://pubmed.ncbi.nlm.nih.gov/6399167/
ID  - 6399167
ER  -