Steven G. Kargl and Philip L. Marston, ``Ray synthesis of the form function for backscattering from an elastic spherical shell: leaky Lamb waves and longitudinal resonances,'' J. Acoust. Soc. Am., 89, 2545-2558 (1991)

Steven G. Kargl and Raymond Lim, ``T-matrix formalism for the scattering from a porous saturated inclusion embedded within a porous saturated medium,'' J. Acoust. Soc. Am., 90, 2371 (1991)